pxa: fix assignment from incompatible pointer type

fix mmc_bread function prototype

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/cpu/pxa/mmc.c b/cpu/pxa/mmc.c
index c0cfe65..039ce0f 100644
--- a/cpu/pxa/mmc.c
+++ b/cpu/pxa/mmc.c
@@ -375,7 +375,7 @@
 
 ulong
 /****************************************************/
-mmc_bread(int dev_num, ulong blknr, ulong blkcnt, ulong * dst)
+mmc_bread(int dev_num, ulong blknr, lbaint_t blkcnt, void *dst)
 /****************************************************/
 {
 	int mmc_block_size = MMC_BLOCK_SIZE;