Comment 4 for bug 1481490

Noting the sfc dependency list:

$ modinfo sfc | grep "depends"
depends: mtd,mdio,ptp,i2c-algo-bit

I've done some test builds for Wily, Vivid, and Trusty and can confirm the sfc dependencies are indeed also included in the udeb (and specifically mtd is included):

Wily:
$ dpkg -c nic-modules-4.2.0-4-generic-di_4.2.0-4.4_amd64.udeb | grep -E "sfc.ko|mtd.ko|mdio.ko|ptp.ko|pps_core.ko|i2c-algo-bit.ko"
-rw-r--r-- root/root 14145 2015-08-10 15:22 ./lib/modules/4.2.0-4-generic/kernel/drivers/i2c/algos/i2c-algo-bit.ko
-rw-r--r-- root/root 91913 2015-08-10 15:22 ./lib/modules/4.2.0-4-generic/kernel/drivers/mtd/mtd.ko
-rw-r--r-- root/root 495281 2015-08-10 15:22 ./lib/modules/4.2.0-4-generic/kernel/drivers/net/ethernet/sfc/sfc.ko
-rw-r--r-- root/root 8977 2015-08-10 15:22 ./lib/modules/4.2.0-4-generic/kernel/drivers/net/mdio.ko
-rw-r--r-- root/root 29673 2015-08-10 15:22 ./lib/modules/4.2.0-4-generic/kernel/drivers/pps/pps_core.ko
-rw-r--r-- root/root 29761 2015-08-10 15:22 ./lib/modules/4.2.0-4-generic/kernel/drivers/ptp/ptp.ko

Vivid:
$ dpkg -c nic-modules-3.19.0-26-generic-di_3.19.0-26.27_amd64.udeb | grep -E "sfc.ko|mtd.ko|mdio.ko|ptp.ko|pps_core.ko|i2c-algo-bit.ko"
-rw-r--r-- root/root 13956 2015-08-10 16:07 ./lib/modules/3.19.0-26-generic/kernel/drivers/i2c/algos/i2c-algo-bit.ko
-rw-r--r-- root/root 96852 2015-08-10 16:07 ./lib/modules/3.19.0-26-generic/kernel/drivers/mtd/mtd.ko
-rw-r--r-- root/root 464452 2015-08-10 16:07 ./lib/modules/3.19.0-26-generic/kernel/drivers/net/ethernet/sfc/sfc.ko
-rw-r--r-- root/root 8812 2015-08-10 16:07 ./lib/modules/3.19.0-26-generic/kernel/drivers/net/mdio.ko
-rw-r--r-- root/root 30500 2015-08-10 16:07 ./lib/modules/3.19.0-26-generic/kernel/drivers/pps/pps_core.ko
-rw-r--r-- root/root 29796 2015-08-10 16:07 ./lib/modules/3.19.0-26-generic/kernel/drivers/ptp/ptp.ko

Trusty:
$ dpkg -c nic-modules-3.13.0-62-generic-di_3.13.0-62.101_amd64.udeb | grep -E "sfc.ko|mtd.ko|mdio.ko|ptp.ko|pps_core.ko|i2c-algo-bit.ko"
-rw-r--r-- root/root 13740 2015-08-10 16:39 ./lib/modules/3.13.0-62-generic/kernel/drivers/i2c/algos/i2c-algo-bit.ko
-rw-r--r-- root/root 94092 2015-08-10 16:39 ./lib/modules/3.13.0-62-generic/kernel/drivers/mtd/mtd.ko
-rw-r--r-- root/root 436284 2015-08-10 16:39 ./lib/modules/3.13.0-62-generic/kernel/drivers/net/ethernet/sfc/sfc.ko
-rw-r--r-- root/root 9644 2015-08-10 16:39 ./lib/modules/3.13.0-62-generic/kernel/drivers/net/mdio.ko
-rw-r--r-- root/root 30684 2015-08-10 16:39 ./lib/modules/3.13.0-62-generic/kernel/drivers/pps/pps_core.ko
-rw-r--r-- root/root 24924 2015-08-10 16:39 ./lib/modules/3.13.0-62-generic/kernel/drivers/ptp/ptp.ko