msm7630: Update for new memory map

New memory map for msm7630 with apps bootloader starting at
0x00100000 (1MB) and shared memory at 0x0.

Add new command "loadaddr:" to nandwrite for querying
the load address of images for flashing.  This allows the
target to respond with the second/larger memory segment
in order to accommodate larger images.
9 files changed