mmc: sunxi: Move bus width configuration to a function

In order to improve readibility and reusability, let's move the bus width
setup to a small function called by our .set_ios hook.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sunxi-mmc.c

@@ -855,6 +855,22 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host,
 	return 0;
 }
 
+static void sunxi_mmc_set_bus_width(struct sunxi_mmc_host *host,
+				   unsigned char width)
+{
+	switch (width) {
+	case MMC_BUS_WIDTH_1:
+		mmc_writel(host, REG_WIDTH, SDXC_WIDTH1);
+		break;
+	case MMC_BUS_WIDTH_4:
+		mmc_writel(host, REG_WIDTH, SDXC_WIDTH4);
+		break;
+	case MMC_BUS_WIDTH_8:
+		mmc_writel(host, REG_WIDTH, SDXC_WIDTH8);
+		break;
+	}
+}
+
 static void sunxi_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct sunxi_mmc_host *host = mmc_priv(mmc);
@@ -903,18 +919,7 @@ static void sunxi_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		break;
 	}
 
-	/* set bus width */
-	switch (ios->bus_width) {
-	case MMC_BUS_WIDTH_1:
-		mmc_writel(host, REG_WIDTH, SDXC_WIDTH1);
-		break;
-	case MMC_BUS_WIDTH_4:
-		mmc_writel(host, REG_WIDTH, SDXC_WIDTH4);
-		break;
-	case MMC_BUS_WIDTH_8:
-		mmc_writel(host, REG_WIDTH, SDXC_WIDTH8);
-		break;
-	}
+	sunxi_mmc_set_bus_width(host, ios->bus_width);
 
 	/* set ddr mode */
 	rval = mmc_readl(host, REG_GCTRL);