spi: simplify call to request_module()

request_module() can handle format strings on its own, no need to create
the full module name ourself.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 9e039c6..74a526c 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -839,7 +839,6 @@
 	struct spi_device *spi;
 	struct device_node *nc;
 	const __be32 *prop;
-	char modalias[SPI_NAME_SIZE + 4];
 	int rc;
 	int len;
 
@@ -944,9 +943,7 @@
 		spi->dev.of_node = nc;
 
 		/* Register the new device */
-		snprintf(modalias, sizeof(modalias), "%s%s", SPI_MODULE_PREFIX,
-			 spi->modalias);
-		request_module(modalias);
+		request_module("%s%s", SPI_MODULE_PREFIX, spi->modalias);
 		rc = spi_add_device(spi);
 		if (rc) {
 			dev_err(&master->dev, "spi_device register error %s\n",