arc: fix off-by-one in _is_in_region()

Similar issue to what was fixed earlier in the MPUv3
code. start + size should be <= r_addr_end. Fixes
a problem where the last byte of an MPU region is
incorrectly reported as out-of-bounds.

Fixes: #15131

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
1 file changed