arm: socfpga: Add temporary workaround for missing SD/MMC patches

Add a small workaround into the platform code which forces the SDMMC
into 8-bit mode (the default configuration for all socfpga platforms)
to work around breakage caused by missing patches in mainline which
switch the probing of SD/MMC to OF instead of static configuraiton.

The patches will hit mainline after the SPL series, so to avoid build
issues, add this small temporary workaround.

Signed-off-by: Marek Vasut <marex@denx.de>

arch/arm/mach-socfpga/misc.c

@@ -123,6 +123,12 @@ int cpu_eth_init(bd_t *bis)
  */
 int cpu_mmc_init(bd_t *bis)
 {
+/*
+ * FIXME: Temporarily define CONFIG_HPS_SDMMC_BUSWIDTH to prevent breakage
+ *        due to missing patches in u-boot/master . The upcoming patch will
+ *        switch this to OF probing, so this whole block will go away.
+ */
+#define CONFIG_HPS_SDMMC_BUSWIDTH	8
 	return socfpga_dwmmc_init(SOCFPGA_SDMMC_ADDRESS,
 				  CONFIG_HPS_SDMMC_BUSWIDTH, 0);
 }