Staging: hv: Rename hv_utils.c to hv_util.c

The hv_utils module will be composed of more than one file;
rename hv_utils.c to accommodate this without changing the module name.

Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: NK. Y. Srinivasan <ksrinivasan@novell.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/Makefile

@@ -10,3 +10,4 @@ hv_vmbus-y := vmbus_drv.o osd.o \
 hv_storvsc-y := storvsc_drv.o storvsc.o
 hv_blkvsc-y := blkvsc_drv.o blkvsc.o
 hv_netvsc-y := netvsc_drv.o netvsc.o rndis_filter.o
+hv_utils-y := hv_util.o