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/m68knommu/kernel/vmlinux.lds.S b/arch/m68knommu/kernel/vmlinux.lds.S
index 6d4585e..07a0055 100644
--- a/arch/m68knommu/kernel/vmlinux.lds.S
+++ b/arch/m68knommu/kernel/vmlinux.lds.S
@@ -133,7 +133,7 @@
 	.data DATA_ADDR : {
 		. = ALIGN(4);
 		_sdata = . ;
-		*(.data)
+		DATA_DATA
 		. = ALIGN(8192) ;
 		*(.data.init_task)
 		_edata = . ;