plat/arm: Move defines to platform specific header file

Some platform specific defines found in 'fwu_nvm.h' header
hence moved such define to platform specific header file.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I1cfd1c95306e2ded5b78d1d6424ad159a958c502
3 files changed