base: Fix AddrRange::isSubset() check

base: Fix AddrRange::isSubset() check

Making _end non-inclusive, introduced a bug in isSubset() which was
checking if _end is included in the input address range. This CL
changes the behavior and now we test if _end - 1 is in the range.

Change-Id: Ib8822472b7c266e10d55f3d5cf22a46aa45c1fc7
Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23663
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>