sf: ops: Fix missing break on spansion read_bar

For assigning read_bar commands in spansion case, break
is missing this patch add that break.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jagan Teki <jteki@openedev.com>
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
index ef45fc1..68f191b 100644
--- a/drivers/mtd/spi/sf_ops.c
+++ b/drivers/mtd/spi/sf_ops.c
@@ -154,6 +154,7 @@
 	case SPI_FLASH_CFI_MFR_SPANSION:
 		flash->bank_read_cmd = CMD_BANKADDR_BRRD;
 		flash->bank_write_cmd = CMD_BANKADDR_BRWR;
+		break;
 	default:
 		flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
 		flash->bank_write_cmd = CMD_EXTNADDR_WREAR;