RH7: Shorten clocksource name to less than 32 chars

Otherwise unbind fails with error "No such device".

Max size is:
 #define CS_NAME_LEN       32
In kernel file:
linux-3.10.0-693.43.1.el7/kernel/time/tick-internal.h

hv-rhel7.x/hv/arch/x86/hyperv/hv_init.c

@@ -72,7 +72,7 @@ static u64 read_hv_clock_tsc(struct clocksource *arg)
 }
 
 static struct clocksource hyperv_cs_tsc = {
-	.name		= "lis_hyperv_clocksource_tsc_page",
+	.name		= "lis_hv_clocksource_tsc_page",
 	.rating		= 425,
 	.read		= read_hv_clock_tsc,
 	.mask		= CLOCKSOURCE_MASK(64),
@@ -93,7 +93,7 @@ static u64 read_hv_clock_msr(struct clocksource *arg)
 }
 
 static struct clocksource hyperv_cs_msr = {
-	.name		= "lis_hyperv_clocksource_msr",
+	.name		= "lis_hv_clocksource_msr",
 	.rating		= 425,
 	.read		= read_hv_clock_msr,
 	.mask		= CLOCKSOURCE_MASK(64),