Use jr as register jump instruction

Current assembler codes are inconsistent in the way of register jump
instruction usage; some use jr, some use j. Of course GNU as allows both
usages, but as can be expected from `Jump Register' the mnemonic `jr' is
more intuitive than `j'. For example, Linux doesn't have `j <reg>' usage
at all.

Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>

cpu/mips/cache.S

@@ -282,7 +282,7 @@ LEAF(dcache_disable)
 	and	t0, t0, t1
 	ori	t0, t0, CONF_CM_UNCACHED
 	mtc0	t0, CP0_CONFIG
-	j	ra
+	jr	ra
 	END(dcache_disable)
 
 #ifdef CFG_INIT_RAM_LOCK_MIPS
@@ -308,7 +308,7 @@ mips_cache_lock:
 	move	a1, a2
 	icacheop(a0,a1,a2,a3,0x1d)
 
-	j	ra
+	jr	ra
 
 	.end	mips_cache_lock
 #endif /* CFG_INIT_RAM_LOCK_MIPS */

cpu/mips/incaip_wdt.S

@@ -68,5 +68,5 @@ disable_incaip_wdt:
 	li	t1, WD_WRITE_ENDINIT
 	sw	t1, WD_CON0(t0)		/* end command */
 
-	j	ra
+	jr	ra
 	nop

cpu/mips/start.S

@@ -286,7 +286,7 @@ reset:
 	la	sp, 0(t0)
 
 	la	t9, board_init_f
-	j	t9
+	jr	t9
 	nop
 
 /*
@@ -342,7 +342,7 @@ relocate_code:
 	/* Jump to where we've relocated ourselves.
 	 */
 	addi	t0, a2, in_ram - _start
-	j	t0
+	jr	t0
 	nop
 
 	.gpword	_GLOBAL_OFFSET_TABLE_	/* _GLOBAL_OFFSET_TABLE_ - _gp	*/
@@ -387,7 +387,7 @@ in_ram:
 
 	move	a0, a1
 	la	t9, board_init_r
-	j	t9
+	jr	t9
 	move	a1, a2		/* delay slot			*/
 
 	.end	relocate_code