KVM: arm64: Enable FEAT_LPA2 based 52 bits IPA size on 4K and 16K

Stage-2 FEAT_LPA2 support is independent and also orthogonal to FEAT_LPA2
support either in Stage-1 or in the host kernel. Stage-2 IPA range support
is evaluated from the platform via ID_AA64MMFR0_TGRAN_2_SUPPORTED_LPA2 and
gets enabled regardless of Stage-1 translation.

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>