all-archs: consolidate .data section definition in asm-generic

With this consolidation we can now modify the .data
section definition in one spot for all archs.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/arch/m68k/kernel/vmlinux-std.lds b/arch/m68k/kernel/vmlinux-std.lds
index a65cef8..78f1392 100644
--- a/arch/m68k/kernel/vmlinux-std.lds
+++ b/arch/m68k/kernel/vmlinux-std.lds
@@ -28,7 +28,7 @@
   _etext = .;			/* End of text section */
 
   .data : {			/* Data */
-	*(.data)
+	DATA_DATA
 	CONSTRUCTORS
 	}