drm/vc4: Allow option to transpose the output on the writeback connector #2622

Job	Run time
build (bcm2835, arm, bcm2835_defconfig, kernel)	9m 25s
build (arm64, arm64, defconfig, kernel8)	32m 27s
build (bcmrpi, arm, bcmrpi_defconfig, kernel)	29m 6s
build (bcm2709, arm, bcm2709_defconfig, kernel7)	29m 26s
build (bcm2711, arm, bcm2711_defconfig, kernel7l)	30m 47s
build (bcm2711_arm64, arm64, bcm2711_defconfig, kernel8)	38m 21s
build (bcm2712, arm64, bcm2712_defconfig, kernel_2712)	38m 6s
	3h 27m 38s

Provide feedback