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/ibf-dsp561/ibf-dsp561.c

@@ -16,10 +16,3 @@ int checkboard(void)
 	printf("       Support: http://www.i-syst.com/\n");
 	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;
-}