KVM: arm64: Allow kvm_has_feat() to take variable arguments

In order to be able to write more compact (and easier to read) code,
let kvm_has_feat() and co take variable arguments. This enables
constructs such as:

	#define FEAT_SME	ID_AA64PFR1_EL1, SME, IMP

	if (kvm_has_feat(kvm, FEAT_SME))
		[...]

which is admitedly more readable.

Signed-off-by: Marc Zyngier <maz@kernel.org>

Author: Marc Zyngier

arch/arm64/include/asm/kvm_host.h

@@ -1572,12 +1572,16 @@ void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val);
 	 kvm_cmp_feat_signed(kvm, id, fld, op, limit) :			\
 	 kvm_cmp_feat_unsigned(kvm, id, fld, op, limit))
 
-#define kvm_has_feat(kvm, id, fld, limit)				\
+#define __kvm_has_feat(kvm, id, fld, limit)				\
 	kvm_cmp_feat(kvm, id, fld, >=, limit)
 
-#define kvm_has_feat_enum(kvm, id, fld, val)				\
+#define kvm_has_feat(kvm, ...) __kvm_has_feat(kvm, __VA_ARGS__)
+
+#define __kvm_has_feat_enum(kvm, id, fld, val)				\
 	kvm_cmp_feat_unsigned(kvm, id, fld, ==, val)
 
+#define kvm_has_feat_enum(kvm, ...) __kvm_has_feat_enum(kvm, __VA_ARGS__)
+
 #define kvm_has_feat_range(kvm, id, fld, min, max)			\
 	(kvm_cmp_feat(kvm, id, fld, >=, min) &&				\
 	kvm_cmp_feat(kvm, id, fld, <=, max))