am33xx/board: use cpu_mmc_init() for default mmc initialization

So platforms can override it with board_mmc_init() if needed.

Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com>
diff --git a/arch/arm/cpu/armv7/am33xx/board.c b/arch/arm/cpu/armv7/am33xx/board.c
index 8280b35..e4c123c 100644
--- a/arch/arm/cpu/armv7/am33xx/board.c
+++ b/arch/arm/cpu/armv7/am33xx/board.c
@@ -46,10 +46,10 @@
 const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
 
 #if defined(CONFIG_OMAP_HSMMC) && !defined(CONFIG_SPL_BUILD)
-int board_mmc_init(bd_t *bis)
+int cpu_mmc_init(bd_t *bis)
 {
 	int ret;
-	
+
 	ret = omap_mmc_init(0, 0, 0);
 	if (ret)
 		return ret;