KVM: arm64: nv: Add trap config for DBGWCR<15>_EL1

Seems that it was missed when MDCR_EL2 was first added to the trap
forwarding infrastructure. Add it back.

Fixes: cb31632 ("KVM: arm64: nv: Add trap forwarding for MDCR_EL2")
Signed-off-by: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>
Link: https://patch.msgid.link/20260130094435.39942-1-zenghui.yu@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>

Author: Zenghui Yu (Huawei)

arch/arm64/kvm/emulate-nested.c

@@ -1166,6 +1166,7 @@ static const struct encoding_to_trap_config encoding_to_cgt[] __initconst = {
 	SR_TRAP(SYS_DBGWCRn_EL1(12),	CGT_MDCR_TDE_TDA),
 	SR_TRAP(SYS_DBGWCRn_EL1(13),	CGT_MDCR_TDE_TDA),
 	SR_TRAP(SYS_DBGWCRn_EL1(14),	CGT_MDCR_TDE_TDA),
+	SR_TRAP(SYS_DBGWCRn_EL1(15),	CGT_MDCR_TDE_TDA),
 	SR_TRAP(SYS_DBGCLAIMSET_EL1,	CGT_MDCR_TDE_TDA),
 	SR_TRAP(SYS_DBGCLAIMCLR_EL1,	CGT_MDCR_TDE_TDA),
 	SR_TRAP(SYS_DBGAUTHSTATUS_EL1,	CGT_MDCR_TDE_TDA),