mogami: add PMEM_CAMERA

for usage with semc libs

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I018562cf11696b6a66645736f0838cf71c00287c
Revert "defconfigs: Use ext4 for ext2 & ext3"

Breaks ext2 & ext3

This reverts commit 914b807de1143b69ecb9e7f6abd3cb5beadaff03.