armv7: add *(.data) back into .romdata section

This doesn't seem to be strictly required (so far), but makes sense.

Change-Id: I18416c427ff886507ae09c7fc1a018baf94af24a
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2131
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/arch/armv7/romstage.ld

@@ -50,6 +50,7 @@ SECTIONS
 	.romdata . : {
 		*(.rodata);
 		*(.machine_param);
+		*(.data);
 		. = ALIGN(8);
 		_erom = .;
 	}