mtd: lpc32xx_slc: Make wp gpio optional
mtd: lpc32xx_slc: Make wp gpio optional

This patch supports missing wp gpio.

Signed-off-by: Alexandre Pereira da Silva <7dd5197115085eca2e5ac8e7d69df60abf351f1d@gmail.com>
Signed-off-by: Roland Stigge <46ef883ee29e711e29b1a68d4ada6c2ebfaacc1f@antcom.de>
Signed-off-by: Artem Bityutskiy <2f96f8cd3e2780a209d0ab27d1b44624d0019d3f@linux.intel.com>

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