hookup sunxi bits for miniroot and ramdisk, tested on pcduino.

note that on boards without ahci you will need to install to usb and still
boot of sd, at least until there's support for the sd slot.
ok patrick@

src/etc/etc.armv7/Makefile.inc

@@ -1,6 +1,6 @@
-#	$OpenBSD: Makefile.inc,v 1.3 2013/10/28 14:10:41 patrick Exp $
+#	$OpenBSD: Makefile.inc,v 1.4 2013/11/01 20:35:52 jasper Exp $
 
-ALLSOC=IMX OMAP
+ALLSOC=IMX OMAP SUNXI
 KERNELS=
 MDEXT=
 
@@ -13,6 +13,7 @@ MDEXT+=		bsd.rd.${SOC}.umg
 
 KERNADDR_OMAP=0x80300000
 KERNADDR_IMX=0x10800000
+KERNADDR_SUNXI=0x40800000
 
 .for CONF K in ${KERNELS}
 .  if !target($K)