KVM: kvm_para_has_feature can be boolean

This patch makes kvm_para_has_feature return bool due to this
particular function only using either one or zero as its return
value.

No functional change.

Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

include/linux/kvm_para.h

@@ -4,10 +4,8 @@
 #include <uapi/linux/kvm_para.h>
 
 
-static inline int kvm_para_has_feature(unsigned int feature)
+static inline bool kvm_para_has_feature(unsigned int feature)
 {
-	if (kvm_arch_para_features() & (1UL << feature))
-		return 1;
-	return 0;
+	return !!(kvm_arch_para_features() & (1UL << feature));
 }
 #endif /* __LINUX_KVM_PARA_H */