lib: utils: fdt_pmu: Do not iterate over the fdt_pmu_evt_select table

The valid entry count is tracking by hw_event_count so there
is no need to check the whole table.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
diff --git a/lib/utils/fdt/fdt_pmu.c b/lib/utils/fdt/fdt_pmu.c
index 684981e..e23e822 100644
--- a/lib/utils/fdt/fdt_pmu.c
+++ b/lib/utils/fdt/fdt_pmu.c
@@ -26,7 +26,7 @@
 	int i;
 	struct fdt_pmu_hw_event_select_map *event;
 
-	for (i = 0; i < SBI_PMU_HW_EVENT_MAX; i++) {
+	for (i = 0; i < hw_event_count; i++) {
 		event = &fdt_pmu_evt_select[i];
 		if (event->eidx == event_idx)
 			return event->select;