[media] max2175: remove an useless comparision

load is an unsigned integer. So, it is always bigger or equal
to zero, as reported by gcc:

	drivers/media/i2c/max2175.c: In function 'max2175_refout_load_to_bits':
	drivers/media/i2c/max2175.c:1272:11: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
	  if (load >= 0 && load <= 40)
	           ^~
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/max2175.c

@@ -1269,7 +1269,7 @@ static const struct v4l2_ctrl_config max2175_na_rx_mode = {
 static int max2175_refout_load_to_bits(struct i2c_client *client, u32 load,
 				       u32 *bits)
 {
-	if (load >= 0 && load <= 40)
+	if (load <= 40)
 		*bits = load / 10;
 	else if (load >= 60 && load <= 70)
 		*bits = load / 10 - 1;