Blackfin: relax .data alignment

The strictest alignment on Blackfin systems is 32bits (since that is the
largest load instruction), so don't force 256byte alignment here.

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

lib_blackfin/u-boot.lds.S

@@ -100,7 +100,7 @@ SECTIONS
 
 	.data :
 	{
-		. = ALIGN(256);
+		. = ALIGN(4);
 		*(.data .data.*)
 		*(.data1)
 		*(.sdata)