MIPS: ralink: add pci group to struct ralink_pinmux

This will be used for RT3662/RT3883.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5173/
1 file changed