power: Use ARRAY_SIZE macro where possible

The common macro was introduced in the commit:
	8fe35cc7dd88bbb82a7732591fac4b8ecd935970

So use it.

Change-Id: Ie47d0e6b91b7bba378b0fdf53a345a021b0c2d48
diff --git a/power-660.c b/power-660.c
index 2edabf9..eb8e2b3 100644
--- a/power-660.c
+++ b/power-660.c
@@ -134,7 +134,7 @@
                               0x41400000, 0x4,
                               0x41820000, 0xA };
                 memcpy(resource_values, res, MIN_VAL(sizeof(resource_values), sizeof(res)));
-                num_resources = sizeof(res)/sizeof(res[0]);
+                num_resources = ARRAY_SIZE(res);
             }
              /*
                  1. CPUfreq params
@@ -152,7 +152,7 @@
                                0x41820000, 0xA,
                                0x40C54000, 0x1F4};
                 memcpy(resource_values, res, MIN_VAL(sizeof(resource_values), sizeof(res)));
-                num_resources = sizeof(res)/sizeof(res[0]);
+                num_resources = ARRAY_SIZE(res);
 
             }
                if (!display_hint_sent) {
@@ -233,7 +233,7 @@
                               0x40C2C000, 0X5,
                               0x41820000, 0xA};
                 memcpy(resource_values, res, MIN_VAL(sizeof(resource_values), sizeof(res)));
-                num_resources = sizeof(res)/sizeof(res[0]);
+                num_resources = ARRAY_SIZE(res);
 
             }
             /*
@@ -250,7 +250,7 @@
                               0x41400100, 0x4,
                               0x41820000, 0xA};
                 memcpy(resource_values, res, MIN_VAL(sizeof(resource_values), sizeof(res)));
-                num_resources = sizeof(res)/sizeof(res[0]);
+                num_resources = ARRAY_SIZE(res);
             }
             camera_hint_ref_count++;
             if (camera_hint_ref_count == 1) {