Staging: hv: rename hyperv_utils.c to hv_utils.c

As the module only has one .c file in it, just name the file
the same as the desired module.

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

drivers/staging/hv/Makefile

@@ -10,4 +10,3 @@ hv_vmbus-objs := vmbus_drv.o osd.o \
 hv_storvsc-objs := storvsc_drv.o StorVsc.o
 hv_blkvsc-objs := blkvsc_drv.o BlkVsc.o
 hv_netvsc-objs := netvsc_drv.o NetVsc.o RndisFilter.o
-hv_utils-objs := hyperv_utils.o