app: aboot: Fix issue with address overlap check function

The address range overlap function fails to take care of boundary
condition for cases where the 'start' address of boot image begins
at the end of aboot address, causing boot up to fail.

CRs-Fixed: 561436
Change-Id: I70cc46265c0b05eff7a03ac38d84f3745b74472b
1 file changed