all archs: consolidate init and exit sections in vmlinux.lds.h

This patch consolidate all definitions of .init.text, .init.data
and .exit.text, .exit.data section definitions in
the generic vmlinux.lds.h.

This is a preparational patch - alone it does not buy
us much good.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

arch/sparc/kernel/vmlinux.lds.S

@@ -48,12 +48,12 @@ SECTIONS
 	__init_begin = .;
 	.init.text : {
 		_sinittext = .;
-		*(.init.text)
+		INIT_TEXT
 		_einittext = .;
 	}
 	__init_text_end = .;
 	.init.data : {
-		*(.init.data)
+		INIT_DATA
 	}
 	. = ALIGN(16);
 	.init.setup : {
@@ -102,8 +102,8 @@ SECTIONS
 	_end = . ;
 	PROVIDE (end = .);
 	/DISCARD/ : {
-		*(.exit.text)
-		*(.exit.data)
+		EXIT_TEXT
+		EXIT_DATA
 		*(.exitcall.exit)
 	}