spi: bcm53xx: make local symbol static

Make local symbol static, because this is used only in this file.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-bcm53xx.c

@@ -210,7 +210,7 @@ static int bcm53xxspi_transfer_one(struct spi_master *master,
  * BCMA
  **************************************************/
 
-struct spi_board_info bcm53xx_info = {
+static struct spi_board_info bcm53xx_info = {
 	.modalias	= "bcm53xxspiflash",
 };