pinctrl: vt8500: Fix wrong offset in bank 10 of newer chips.

Signed-off-by: Helmut Stengele <lautriv@coldplug.net>
Pinctrl: vt8500: Saparate pinctrl for wm8880

Mainly for testing purposes and may be merged
back to 8850 later on. This commit includes
certain cosmetic and functional changes to DT's
where the most relevant part is a correct
mmio-range for chips having more than one mmc.
( using 0x400 instead 0x1000 ) and the
compatible entry for wm8880-uart.

Signed-off-by: Helmut Stengele <lautriv@coldplug.net>