arch-arm: Avoid creating an empty byteEnable vector

This behaviour will be forbidden in following patches.
Instead, create an all true vector.

JIRA: https://gem5.atlassian.net/browse/GEM5-196

Change-Id: I61d2852610281f2d7c7a669dcb4d2728be194f52
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23524
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed