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/avr32/kernel/vmlinux.lds.c b/arch/avr32/kernel/vmlinux.lds.c
index dbba391..db0438f 100644
--- a/arch/avr32/kernel/vmlinux.lds.c
+++ b/arch/avr32/kernel/vmlinux.lds.c
@@ -112,7 +112,7 @@
 
 		/* And the rest... */
 		*(.data.rel*)
-		*(.data)
+		DATA_DATA
 		CONSTRUCTORS
 
 		_edata = .;