KVM: arm64: ptdump: Test PMD_TYPE_MASK for block mapping

KVM: arm64: ptdump: Test PMD_TYPE_MASK for block mapping

Test given page table entries against PMD_TYPE_SECT on PMD_TYPE_MASK mask
bits for identifying block mappings in stage 2 page tables.

Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: kvmarm@lists.linux.dev
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Link: https://lore.kernel.org/r/20250221044227.1145393-2-anshuman.khandual@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>