Input: matrix-keymap - switch to use device_property_count_u32()

Use use device_property_count_u32() directly, that makes code neater.

Signed-off-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/matrix-keymap.c

···
 	if (!propname)
 		propname = "linux,keymap";
 
-	size = device_property_read_u32_array(dev, propname, NULL, 0);
+	size = device_property_count_u32(dev, propname);
 	if (size <= 0) {
 		dev_err(dev, "missing or malformed property %s: %d\n",
 			propname, size);