Staging: hv: fix up formatting issues in utils.h

--------  cut here and print out and paste on wall --------

			Tabs, not spaces

--------  cut here and print out and paste on wall --------

Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/utils.h

@@ -18,8 +18,8 @@
  *   Haiyang Zhang <haiyangz@microsoft.com>
  *   Hank Janssen  <hjanssen@microsoft.com>
  */
-#ifndef _UTILS_H_
-#define _UTILS_H_
+#ifndef __HV_UTILS_H_
+#define __HV_UTILS_H_
 
 /*
  * Common header for Hyper-V ICs
@@ -91,4 +91,4 @@ extern void shutdown_linux_system(void);
 extern void chn_cb_negotiate(void *);
 extern struct hyperv_service_callback hv_cb_utils[];
 
-#endif /* _UTILS_H_ */
+#endif /* __HV_UTILS_H_ */