pxa: fix assignment from incompatible pointer type

fix mmc_bread function prototype

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

cpu/pxa/mmc.c

@@ -375,7 +375,7 @@ mmc_write(uchar * src, ulong dst, int size)
 
 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;