ARM: mach-shmobile: mackerel: SCIF port for earlyprintk when using zboot

Initialise the SCIF serial port to allow earlyprintk
output when using zboot. It is based on a very similar
patched for AP4EB.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/arm/mach-shmobile/include/mach/head-mackerel.txt

@@ -85,3 +85,10 @@ ED 0xE6150004, 0x80331050
 WAIT 1, 0xFE40009C
 
 ED 0xE6150354, 0x00000002
+
+LIST "SCIF0 - Serial port for earlyprintk"
+EB 0xE6053098, 0x11
+EB 0xE6053098, 0xe1
+EW 0xE6C40000, 0x0000
+EB 0xE6C40004, 0x19
+EW 0xE6C40008, 0x3000