ARM,relocate: do not use r9

r9 is a platform-specific register in ARM EABI and not per
definition a general purpose register. Do not use it while
relocating so it can be used for gd.

cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>

arch/arm/lib/relocate.S

@@ -22,7 +22,7 @@
 
 ENTRY(relocate_code)
 	ldr	r1, =__image_copy_start	/* r1 <- SRC &__image_copy_start */
-	subs	r9, r0, r1		/* r9 <- relocation offset */
+	subs	r4, r0, r1		/* r4 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	ldr	r2, =__image_copy_end	/* r2 <- SRC &__image_copy_end */
 
@@ -44,9 +44,9 @@ fixloop:
 	bne	fixnext
 
 	/* relative fix: increase location by offset */
-	add	r0, r0, r9
+	add	r0, r0, r4
 	ldr	r1, [r0]
-	add	r1, r1, r9
+	add	r1, r1, r4
 	str	r1, [r0]
 fixnext:
 	cmp	r2, r3