wifi: ath9k: Add PTP patch from wifi-ptp project #3707

Job	Run time
build (bcm2709, arm, bcm2709_defconfig, kernel7)	31m 4s
build (bcmrpi, arm, bcmrpi_defconfig, kernel)	30m 46s
build (arm64, arm64, defconfig, kernel8)	37m 18s
build (bcm2712, arm64, bcm2712_defconfig, kernel_2712)	43m 36s
build (bcm2835, arm, bcm2835_defconfig, kernel)	9m 42s
build (bcm2711_rt, arm64, bcm2711_rt_defconfig, kernel8_rt)	44m 31s
build (bcm2711, arm64, bcm2711_defconfig, kernel8)	43m 43s
	4h 0m 40s

Provide feedback