MX31: pin definition for sdhc2
MX31: pin definition for sdhc2

This also adds the pins used on mx31moboard for WP and CD

Signed-off-by: Valentin Longchamp <cc862ae8d0fd06d0d1914a80a04d65058a9d84fd@epfl.ch>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs