Enable features for supporting PXE installer

[Jesse Sung]

== Impact ==
The PXE installer requires some features available in order to run.

== Fix ==
* CONFIG_ISO9660_FS=m
* CONFIG_BCACHE=m
* enable zfs

== Risk of Regression ==
Low. These features are also enabled in the generic kernel for arm64, and has been tested on the target platform.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Alfonso Sanchez-Beato (alfonsosanchezbeato)]

I have successfully finished an installation with this kernel, changing to verified.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-bluefield - 5.4.0-1016.19

---------------
linux-bluefield (5.4.0-1016.19) focal; urgency=medium

  [ Ubuntu: 5.4.0-80.90 ]

  * CVE-2021-33909
    - SAUCE: seq_file: Disallow extremely large seq buffer allocations

linux-bluefield (5.4.0-1015.18) focal; urgency=medium

  * focal/linux-bluefield: 5.4.0-1015.18 -proposed tracker (LP: #1934322)

  [ Ubuntu: 5.4.0-79.88 ]

  * focal/linux: 5.4.0-79.88 -proposed tracker (LP: #1934343)
  * lxd exec fails (LP: #1934187)
    - SAUCE: Revert "proc: Check /proc/$pid/attr/ writes against file opener"

linux-bluefield (5.4.0-1014.17) focal; urgency=medium

  * focal/linux-bluefield: 5.4.0-1014.17 -proposed tracker (LP: #1932457)

  * Change CONFIG_NF_CONNTRACK to y (LP: #1932042)
    - [Config] CONFIG_NF_CONNTRACK=y

  * Enable features for supporting PXE installer (LP: #1932035)
    - [Config] enable ISO9660, bcache, and zfs support

  * PKA: Fix NULL pointer kfree() issue (LP: #1931584)
    - pka: Fix NULL pointer kfree() issue

  [ Ubuntu: 5.4.0-78.87 ]

  * focal/linux: 5.4.0-78.87 -proposed tracker (LP: #1932478)
  * Packaging resync (LP: #1786013)
    - [Packaging] resync getabis
    - [Packaging] update helper scripts
    - update dkms package versions
  * Disable hv-kvp-daemon.service on certain instance types (LP: #1932081)
    - [Packaging]: Add kernel command line condition to hv-kvp-daemon service
  * QLogic Direct-Connect host can't discover SCSI-FC or NVMe/FC devices
    (LP: #1860724)
    - scsi: qla2xxx: Serialize fc_port alloc in N2N
    - scsi: qla2xxx: Set Nport ID for N2N
    - scsi: qla2xxx: Fix point-to-point (N2N) device discovery issue
    - scsi: qla2xxx: Fix N2N and NVMe connect retry failure
  * [SRU] Add support for E810 NIC to Ice Driver in Focal (LP: #1912511)
    - ice: add additional E810 device id
  * Focal update: v5.4.124 upstream stable release (LP: #1931166)
    - ALSA: hda/realtek: Headphone volume is controlled by Front mixer
    - ALSA: usb-audio: scarlett2: Fix device hang with ehci-pci
    - ALSA: usb-audio: scarlett2: Improve driver startup messages
    - cifs: set server->cipher_type to AES-128-CCM for SMB3.0
    - NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
    - iommu/vt-d: Fix sysfs leak in alloc_iommu()
    - perf intel-pt: Fix sample instruction bytes
    - perf intel-pt: Fix transaction abort handling
    - perf scripts python: exported-sql-viewer.py: Fix copy to clipboard from Top
      Calls by elapsed Time report
    - perf scripts python: exported-sql-viewer.py: Fix Array TypeError
    - perf scripts python: exported-sql-viewer.py: Fix warning display
    - proc: Check /proc/$pid/attr/ writes against file opener
    - net: hso: fix control-request directions
    - ath10k: Validate first subframe of A-MSDU before processing the list
    - dm snapshot: properly fix a crash when an origin has no snapshots
    - drm/amdgpu/vcn1: add cancel_delayed_work_sync before power gate
    - drm/amdgpu/vcn2.0: add cancel_delayed_work_sync before power gate
    - drm/amdgpu/vcn2.5: add cancel_delayed_work_sync before power gate
    - selftests/gpio: Use TEST_GEN_PROGS_EXTENDED
    - selftests/gpi...