[ifc6640][db820c] enable support for UFS drive

[Shrirang Bagul]

The Inforce 6640 and Dragonboard 820 have a Universal Flash Storage (UFS) drive on board. This is a tracking bug for enabling kernel support on these platforms.

[Impact]
Both Dragonboard 820c and Inforce 6640 (based on Snapdragon820 SoC) have a
Universal Flash Drive on-board. These patches fix the instabiliy issues and
enable support for the UFS.

[Fix]
Fix the bring-up of the QMP PHY shared between the UFS and the PCIE ports.
This patch set reverts patches picked-up from Linaro development tree and
replaces them with necessary updates from upstream mainline and stable kernel
trees.

[Test Case]
Test kernel based on Ubuntu-snapdragon-4.15.0-1068.75 was verified on both the
DB820c and IFC6640.

[Regression Risk]
Low. Kernel configs enabling the UFS were disabled in previous versions.

This is a tracking bug, please don't triage

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-snapdragon - 4.15.0-1071.78

---------------
linux-snapdragon (4.15.0-1071.78) bionic; urgency=medium

  * bionic/linux-snapdragon: 4.15.0-1071.78 -proposed tracker (LP: #1859793)

  * [ifc6640][db820c] enable support for UFS drive (LP: #1853556)
    - Revert "UBUNTU: [Config] disable PHY_QCOM_UFS"
    - Revert "UBUNTU: [Config] disable SCSI_UFSHCD"
    - Revert "dts: arm64/msm8996: Fix power domain for ufs"
    - Revert "arm64: dts: Add ufs dts nodes"
    - arm64: dts: qcom: msm8996: Add ufs related nodes
    - Revert "scsi: ufs: qcom: Expose the reset controller for PHY"
    - Revert "scsi: ufs: make UFS Tx lane1 clock optional for QCOM platforms"
    - Revert "scsi: ufs: ufshcd_dump_regs to use memcpy_fromio"
    - Revert "scsi: ufs: ufs-qcom: remove broken hci version quirk"
    - Revert "scsi/ufs: qcom: Remove ufs_qcom_phy_*() calls from host"
    - scsi/ufs: qcom: Remove ufs_qcom_phy_*() calls from host
    - scsi: ufs-qcom: Re-factor ufshcd_get_pwr_dev_param
    - scsi: ufs: Remove select of phy-qcom-ufs from ufs-qcom
    - scsi: ufs: qcom: Expose the reset controller for PHY
    - dt-bindings: ufs: Add #reset-cells for Qualcomm controllers
    - dt-bindings: phy-qcom-qmp: Add UFS PHY reset
    - dt-bindings: phy: qcom-ufs: Add resets property
    - arm64: dts: msm8996: Add UFS PHY reset controller
    - scsi: ufs: Introduce ufshcd_get_pwr_dev_param
    - phy: qcom-qmp: Drop useless msm8998_pciephy_cfg setting
    - phy: qcom-qmp: Raise qcom_qmp_phy_enable() polling delay
    - phy: qcom-qmp: Correct ready status, again
    - PCI: qcom: Use regulator bulk api for apq8064 supplies
    - PCI: qcom: Fix a bitwise vs logical NOT typo
    - PCI: qcom: Include gpio/consumer.h
    - PCI: qcom: Drop unnecessary root_bus_nr setting
    - PCI: Add Qualcomm vendor ID
    - PCI: qcom: Use default config space read function
    - PCI: qcom: Use clk bulk API for 2.4.0 controllers
    - phy: make phy-core explicitly non-modular
    - phy: core: Invoke pm_runtime_get_*/pm_runtime_put_* before invoking reset
      callback
    - SAUCE: phy: qcom-qmp: Increase PHY ready timeout
    - SAUCE: phy: qcom: qmp: Use power_on/off ops for PCIe
    - SAUCE: arm64: dts: msm8996: db820c: disable pcie1 bus

  [ Ubuntu: 4.15.0-75.85 ]

  * bionic/linux: 4.15.0-75.85 -proposed tracker (LP: #1859705)
  * use-after-free in i915_ppgtt_close (LP: #1859522) // CVE-2020-7053
    - SAUCE: drm/i915: Fix use-after-free when destroying GEM context
  * CVE-2019-14615
    - drm/i915/gen9: Clear residual context state on context switch
  * PAN is broken for execute-only user mappings on ARMv8 (LP: #1858815)
    - arm64: Revert support for execute-only user mappings
  * [Regression] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
    (LP: #1856608)
    - SAUCE: Revert "usb: handle warm-reset port requests on hub resume"
  * Miscellaneous Ubuntu changes
    - update dkms package versions

  [ Ubuntu: 4.15.0-74.84 ]

  * bionic/linux: 4.15.0-74.84 -proposed tracker (LP: #1856749)
  * [Hyper-V] KVP daemon fails to start on first boot of disco VM (LP: #1820063)
    - [Packaging] bind hv_kvp_daemon startup to hv_kvp device
  * Unrevert...