powerpc: create 32 bit LOADADDR macro

and use it in misc_32.S

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index fa8c20f..2727410 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -43,8 +43,7 @@
 	mflr	r0
 	bl	1f
 1:	mflr	r3
-	lis	r4,1b@ha
-	addi	r4,r4,1b@l
+	LOADADDR(r4,1b)
 	subf	r3,r4,r3
 	mtlr	r0
 	blr
@@ -56,8 +55,7 @@
 	mflr	r0
 	bl	1f
 1:	mflr	r5
-	lis	r4,1b@ha
-	addi	r4,r4,1b@l
+	LOADADDR(r4,1b)
 	subf	r5,r4,r5
 	add	r3,r3,r5
 	mtlr	r0