drm/panel: st7701: Add support for Pimoroni HyperPixel 2.1 Round (6.18) #4332

Job	Run time
build (bcmrpi, arm, bcmrpi_defconfig, kernel)	19m 4s
build (bcm2835, arm, bcm2835_defconfig, kernel)	6m 43s
build (arm64, arm64, defconfig, kernel8)	23m 14s
build (bcm2709, arm, bcm2709_defconfig, kernel7)	19m 23s
build (bcm2712, arm64, bcm2712_defconfig, kernel_2712)	26m 40s
build (bcm2711, arm64, bcm2711_defconfig, kernel8)	24m 33s
build (bcm2711_rt, arm64, bcm2711_rt_defconfig, kernel8_rt)	26m 10s
	2h 25m 47s

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