drm/amd/powerplay: Use ARRAY_SIZE for smu7_profiling

Fixes coccicheck warning:

drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c:4946:28-29: WARNING: Use ARRAY_SIZE
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: Nzhengbin <zhengbin13@huawei.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c

@@ -4943,7 +4943,7 @@ static int smu7_get_power_profile_mode(struct pp_hwmgr *hwmgr, char *buf)
 			title[0], title[1], title[2], title[3],
 			title[4], title[5], title[6], title[7]);
 
-	len = sizeof(smu7_profiling) / sizeof(struct profile_mode_setting);
+	len = ARRAY_SIZE(smu7_profiling);
 
 	for (i = 0; i < len; i++) {
 		if (i == hwmgr->power_profile_mode) {