arm: Remove unused relocate_code() parameters

Commit e05e5de7fae5bec79617e113916dac6631251156 made the 2 1st parameters of
ARM's relocate_code() useless since it moved the code handling them to crt0.S.
So, drop these parameters.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
diff --git a/arch/arm/cpu/arm720t/start.S b/arch/arm/cpu/arm720t/start.S
index a640eaa..9facc7e 100644
--- a/arch/arm/cpu/arm720t/start.S
+++ b/arch/arm/cpu/arm720t/start.S
@@ -156,15 +156,13 @@
 /*------------------------------------------------------------------------------*/
 
 /*
- * void relocate_code (addr_sp, gd, addr_moni)
+ * void relocate_code(addr_moni)
  *
  * This function relocates the monitor code.
  */
 	.globl	relocate_code
 relocate_code:
-	mov	r4, r0	/* save addr_sp */
-	mov	r5, r1	/* save addr of gd */
-	mov	r6, r2	/* save addr of destination */
+	mov	r6, r0	/* save addr of destination */
 
 	adr	r0, _start
 	subs	r9, r6, r0		/* r9 <- relocation offset */