KVM: arm64: nv: Expose FEAT_RASv1p1 via RAS_frac

KVM already supports FEAT_RASv1p1 for NV-enabled VMs but only when
advertised through the canonical field. Stop masking the silly frac
field to expose the feature on systems without FEAT_DF.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>

Author: oupton

arch/arm64/kvm/nested.c

@@ -1471,7 +1471,6 @@ u64 limit_nv_id_reg(struct kvm *kvm, u32 reg, u64 val)
 			 ID_AA64PFR1_EL1_SME		|
 			 ID_AA64PFR1_EL1_RES0		|
 			 ID_AA64PFR1_EL1_MPAM_frac	|
-			 ID_AA64PFR1_EL1_RAS_frac	|
 			 ID_AA64PFR1_EL1_MTE);
 		break;