mtd: spi-nor: Void return type for spi_nor_clear_sr/fsr()

spi_nor_clear_sr() and spi_nor_clear_fsr() are called just in case
of errors. The callers didn't check their return value, make them
of type void.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

drivers/mtd/spi-nor/spi-nor.c

@@ -714,7 +714,7 @@ static int s3an_sr_ready(struct spi_nor *nor)
 	return !!(nor->bouncebuf[0] & XSR_RDY);
 }
 
-static int spi_nor_clear_sr(struct spi_nor *nor)
+static void spi_nor_clear_sr(struct spi_nor *nor)
 {
 	int ret;
 
@@ -733,8 +733,6 @@ static int spi_nor_clear_sr(struct spi_nor *nor)
 
 	if (ret)
 		dev_dbg(nor->dev, "error %d clearing SR\n", ret);
-
-	return ret;
 }
 
 static int spi_nor_sr_ready(struct spi_nor *nor)
@@ -758,7 +756,7 @@ static int spi_nor_sr_ready(struct spi_nor *nor)
 	return !(nor->bouncebuf[0] & SR_WIP);
 }
 
-static int spi_nor_clear_fsr(struct spi_nor *nor)
+static void spi_nor_clear_fsr(struct spi_nor *nor)
 {
 	int ret;
 
@@ -777,8 +775,6 @@ static int spi_nor_clear_fsr(struct spi_nor *nor)
 
 	if (ret)
 		dev_dbg(nor->dev, "error %d clearing FSR\n", ret);
-
-	return ret;
 }
 
 static int spi_nor_fsr_ready(struct spi_nor *nor)