UPSTREAM: KVM: arm64: Fix off-by-one in range_is_memory

Hyp checks whether an address range only covers RAM by checking the
start/endpoints against a list of memblock_region structs. However,
the endpoint here is exclusive but internally is treated as inclusive.
Fix the off-by-one error that caused valid address ranges to be
rejected.

Cc: Quentin Perret <qperret@google.com>
Fixes: 90134ac9 ("KVM: arm64: Protect the .hyp sections from the host")
Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210728153232.1018911-2-dbrazdil@google.com


(cherry picked from commit facee1be)
Bug: 187129171
Signed-off-by: Connor O'Brien <connoro@google.com>
Change-Id: I44dbdbd9fde3c4a44e9af1ad317e0123d5472685