ath79: Add support for Sophos AP15C #4508

Job	Run time
changed	3s
build_firmware (armsr-armv7)	1h 23m 28s
build_firmware (armsr-armv8)	1h 34m 25s
build_firmware (ath79-generic)	1h 25m 8s
build_firmware (ath79-nand)	1h 21m 28s
build_firmware (ath79-mikrotik)	1h 24m 52s
build_firmware (bcm27xx-bcm2708)	1h 19m 33s
build_firmware (bcm27xx-bcm2709)	1h 24m 38s
build_firmware (ipq40xx-generic)	1h 25m 33s
build_firmware (ipq40xx-mikrotik)	1h 23m 35s
build_firmware (ipq806x-generic)	1h 22m 9s
build_firmware (lantiq-xrx200)	1h 25m 8s
build_firmware (lantiq-xway)	1h 24m 57s
build_firmware (mediatek-filogic)	1h 35m 55s
build_firmware (mediatek-mt7622)	1h 31m 7s
build_firmware (mpc85xx-p1010)	1h 21m 35s
build_firmware (mpc85xx-p1020)	1h 22m 43s
build_firmware (ramips-mt7620)	1h 23m 19s
build_firmware (ramips-mt7621)	1h 25m 49s
build_firmware (ramips-mt76x8)	1h 22m 57s
build_firmware (realtek-rtl838x)	1h 9m 34s
build_firmware (rockchip-armv8)	1h 33m 18s
build_firmware (sunxi-cortexa7)	1h 17m 57s
build_firmware (x86-generic)	1h 32m 45s
build_firmware (x86-geode)	1h 32m 31s
build_firmware (x86-legacy)	1h 30m 25s
build_firmware (x86-64)	1h 39m 5s
build_firmware (bcm27xx-bcm2710)	1h 29m 45s
build_firmware (bcm27xx-bcm2711)	1h 30m 49s
build_firmware (kirkwood-generic)	1h 21m 30s
build_firmware (mvebu-cortexa9)	1h 22m 31s
	1d 18h 58m 32s

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