input: touchscreen: Add support for GOODiX GT801 2+1

Based on
    https://raw.github.com/zhangdaiyan/my-allwinner-ics_linux-3.0/099851438f0a51f30bc2df153ea236b56a79a59b/drivers/input/touchscreen/gt801_2plus1.h
    https://raw.github.com/zhangdaiyan/my-allwinner-ics_linux-3.0/099851438f0a51f30bc2df153ea236b56a79a59b/drivers/input/touchscreen/gt801_2plus1.c

And fixed up by me to read the fex correctly and do the right wakeup/enable
pin dance for this touchscreen.

Signed-off-by: Emilio López <turl@linux-sunxi.org>
ARM: sunxi: enable KEYBOARD_SUN4I_KEYBOARD_FEX

This lets us specify keybindings on the fex using a [tabletkeys_para]
section.

Signed-off-by: Emilio López <turl@linux-sunxi.org>
ARM: sunxi: enable TOUCHSCREEN_GT801_2PLUS1_TS

Signed-off-by: Emilio López <turl@linux-sunxi.org>
media: video: sun4i_csi: Fix build failure on mt9m112

The -Warray-bounds flag was triggering a build failure. Fix it.

Signed-off-by: Emilio López <turl@linux-sunxi.org>