spi/mpc52xx: Combine substrings for two messages

The script "checkpatch.pl" pointed information out like the following.

WARNING: quoted string split across lines

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/spi/spi-mpc52xx.c

···
 			gpio_cs = of_get_gpio(op->dev.of_node, i);
 			if (gpio_cs < 0) {
 				dev_err(&op->dev,
-					"could not parse the gpio field "
-					"in oftree\n");
+					"could not parse the gpio field in oftree\n");
 				rc = -ENODEV;
 				goto err_gpio;
 			}
···
 			rc = gpio_request(gpio_cs, dev_name(&op->dev));
 			if (rc) {
 				dev_err(&op->dev,
-					"can't request spi cs gpio #%d "
-					"on gpio line %d\n", i, gpio_cs);
+					"can't request spi cs gpio #%d on gpio line %d\n",
+					i, gpio_cs);
 				goto err_gpio;
 			}