KVM: arm64: Kill unused vcpu flags field

Horray, we have now sorted all the preexisting flags, and the
'flags' field is now unused. Get rid of it while nobody is
looking.
Reviewed-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

arch/arm64/include/asm/kvm_host.h

@@ -332,9 +332,6 @@ struct kvm_vcpu_arch {
 		FP_STATE_GUEST_OWNED,
 	} fp_state;
 
-	/* Miscellaneous vcpu state flags */
-	u64 flags;
-
 	/* Configuration flags, set once and for all before the vcpu can run */
 	u64 cflags;