[msm] Update ramdisk and scratch address for 7x27 and 8x50

scratch address overlapping with ramdisk address potentially breaks
'fastboot boot boot.img'.  Fixing ramdisk to be consistent with offsets
as expected in mkbootimg and make sure it does not overlap with scratch.

Change-Id: Ieb3529b15becd885044c53b23c7c490f6ae3a859
4 files changed