UPSTREAM: KVM: arm64: Add build validation for FGT trap mask values

These checks help ensure that all the bits are accounted for,
that there hasn't been a transcribing error from the spec nor
from the generated mask values, which will be used in subsequent
patches.

Bug: 278749606
Change-Id: Ibfc2f9103dc0434ae3f1683341aeb579ef9d01fc
Signed-off-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20231214100158.2305400-12-tabba@google.com
(cherry picked from commit 6c4abbea)