Blackfin: kill off useless initdram() usage

While the initdram() function makes sense on some arches, it doesn't for
Blackfin systems as it's always implemented the same way.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

board/bf538f-ezkit/bf538f-ezkit.c

@@ -20,13 +20,6 @@ int checkboard(void)
 	return 0;
 }
 
-phys_size_t initdram(int board_type)
-{
-	gd->bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
-	gd->bd->bi_memsize = CONFIG_SYS_MAX_RAM_SIZE;
-	return gd->bd->bi_memsize;
-}
-
 #ifdef CONFIG_SMC91111
 int board_eth_init(bd_t *bis)
 {