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>
diff --git a/board/dbau1x00/lowlevel_init.S b/board/dbau1x00/lowlevel_init.S
index 14a7846..27b51f7 100644
--- a/board/dbau1x00/lowlevel_init.S
+++ b/board/dbau1x00/lowlevel_init.S
@@ -586,5 +586,5 @@
 	sw	t1, 0(t0)
 	sync
 
-	j	ra
+	jr	ra
 	nop
diff --git a/board/gth2/lowlevel_init.S b/board/gth2/lowlevel_init.S
index eea378a..bf615c1 100644
--- a/board/gth2/lowlevel_init.S
+++ b/board/gth2/lowlevel_init.S
@@ -450,7 +450,7 @@
 	nop
 	nop
 memtestend:
-	j	ra
+	jr	ra
 	nop
 
 memhang:
diff --git a/board/incaip/lowlevel_init.S b/board/incaip/lowlevel_init.S
index b39f93d..08f7f21 100644
--- a/board/incaip/lowlevel_init.S
+++ b/board/incaip/lowlevel_init.S
@@ -105,7 +105,7 @@
 	li	t2, 0x684143FD
 	sw	t2, EBU_BUSCON1(t1)
 3:
-	j	ra
+	jr	ra
 	nop
 
 	.end	ebu_init
@@ -170,7 +170,7 @@
 	li	t2, 0x80000001
 	sw	t2, CGU_MUXCR(t1)
 5:
-	j	ra
+	jr	ra
 	nop
 
 	.end	cgu_init
@@ -266,7 +266,7 @@
 	li	t2, 0x00000001
 	sw	t2, MC_CTRLENA(t1)
 
-	j	ra
+	jr	ra
 	nop
 
 	.end	sdram_init
@@ -298,7 +298,7 @@
 	nop
 	move	ra, t0
 
-	j	ra
+	jr	ra
 	nop
 
 	.end	lowlevel_init
diff --git a/board/pb1x00/lowlevel_init.S b/board/pb1x00/lowlevel_init.S
index e851e2f..98bb394 100644
--- a/board/pb1x00/lowlevel_init.S
+++ b/board/pb1x00/lowlevel_init.S
@@ -388,5 +388,5 @@
 	*/
 	sync
 
-	j	ra
+	jr	ra
 	nop
diff --git a/board/purple/lowlevel_init.S b/board/purple/lowlevel_init.S
index 668124a..b9d03fc 100644
--- a/board/purple/lowlevel_init.S
+++ b/board/purple/lowlevel_init.S
@@ -33,5 +33,5 @@
 	li	t0, MC_IOGP
 	li	t1, 0xf24
 	sw	t1, 0(t0)
-	j	ra
+	jr	ra
 	nop
diff --git a/board/qemu-mips/lowlevel_init.S b/board/qemu-mips/lowlevel_init.S
index 28166bc..836e027 100644
--- a/board/qemu-mips/lowlevel_init.S
+++ b/board/qemu-mips/lowlevel_init.S
@@ -37,5 +37,5 @@
 	mtc0	zero, CP0_WIRED
 	nop
 
-	j	ra
+	jr	ra
 	nop