mmc: sdhci: return error when failed add_sdhci().

If failed the add_host(), it is reasonable that return value of
add_sdhci().

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

drivers/mmc/mv_sdhci.c

@@ -51,6 +51,5 @@ int mv_sdh_init(u32 regbase, u32 max_clk, u32 min_clk, u32 quirks)
 		host->version = sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
 	else
 		host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
-	add_sdhci(host, max_clk, min_clk);
-	return 0;
+	return add_sdhci(host, max_clk, min_clk);
 }

drivers/mmc/s5p_sdhci.c

@@ -94,6 +94,5 @@ int s5p_sdhci_init(u32 regbase, int index, int bus_width)
 
 	host->host_caps = MMC_MODE_HC;
 
-	add_sdhci(host, 52000000, 400000);
-	return 0;
+	return add_sdhci(host, 52000000, 400000);
 }