sh: jump to p1 during boot on kfr2r09

Add a P1 jump to the the kfr2r09 romimage code. With this
patch applied the initial zImage assembly code will run
with instruction cache enabled.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/include/mach-kfr2r09/mach/romimage.h

@@ -73,3 +73,16 @@
 .endm
 
 #include "partner-jet-setup.txt"
+
+	/* execute icbi after enabling cache */
+	mov.l	1f, r0
+	icbi	@r0
+
+	/* jump to cached area */
+	mova	2f, r0
+	jmp	@r0
+	 nop
+
+	.align 2
+1:	.long 0xa8000000
+2: