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/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index cfe4b67..9b9992c 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -62,7 +62,7 @@
     . = ALIGN(_PAGE_SIZE);
     *(.data.init_task)
 
-    *(.data)
+    DATA_DATA
 
     CONSTRUCTORS
   }