drivers: counter: align ace rtc get_value with api

This will align ace rtc get_value parameter with counter api
and fix build warning

Signed-off-by: Adrian Bonislawski <adrian.bonislawski@intel.com>
diff --git a/drivers/counter/counter_ace_v1x_rtc.c b/drivers/counter/counter_ace_v1x_rtc.c
index a8e2170..1ce2d82 100644
--- a/drivers/counter/counter_ace_v1x_rtc.c
+++ b/drivers/counter/counter_ace_v1x_rtc.c
@@ -12,7 +12,7 @@
 #include <counter/counter_ace_v1x_rtc_regs.h>
 
 static int counter_ace_v1x_rtc_get_value(const struct device *dev,
-		int64_t *value)
+		uint64_t *value)
 {
 	ARG_UNUSED(dev);