media: ov5693: count num_supplies using array_size

Instead of hardcode OV5693_NUM_SUPPLIES in a define is better use
ARRAY_SIZE function to count the number of supplies from
ov5693_supply_names array
Signed-off-by: NTommaso Merciai <tommaso.merciai@amarulasolutions.com>
Reviewed-by: NJacopo Mondi <jacopo@jmondi.org>
Reviewed-by: NDaniel Scally <djrscally@gmail.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/i2c/ov5693.c

@@ -127,11 +127,15 @@
 #define OV5693_LINK_FREQ_419_2MHZ		419200000
 #define OV5693_PIXEL_RATE			167680000
 
-/* Miscellaneous */
-#define OV5693_NUM_SUPPLIES			2
-
 #define to_ov5693_sensor(x) container_of(x, struct ov5693_device, sd)
 
+static const char * const ov5693_supply_names[] = {
+	"avdd",		/* Analog power */
+	"dovdd",	/* Digital I/O power */
+};
+
+#define OV5693_NUM_SUPPLIES	ARRAY_SIZE(ov5693_supply_names)
+
 struct ov5693_reg {
 	u32 reg;
 	u8 val;
@@ -352,11 +356,6 @@ static const s64 link_freq_menu_items[] = {
 	OV5693_LINK_FREQ_419_2MHZ
 };
 
-static const char * const ov5693_supply_names[] = {
-	"avdd",
-	"dovdd",
-};
-
 static const char * const ov5693_test_pattern_menu[] = {
 	"Disabled",
 	"Random Data",