Make use of u-boot 2015.07's unified wandboard config to provide a

miniroot to cover all current wandboard variations.
Unlike the other imx u-boot configs the wandboard config doesn't search
for ext2 only a fat fs.
Grow the ramdisk size to fit the extra u-boot files.
From Roman Kravchuk.

src/etc/etc.armv7/Makefile.inc

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile.inc,v 1.11 2015/07/17 17:02:52 jsg Exp $
+#	$OpenBSD: Makefile.inc,v 1.12 2015/08/01 00:15:37 jsg Exp $
 
 ALLSOC=EXYNOS IMX OMAP SUNXI VEXPRESSA9 VEXPRESSA15
 MDEXT=		bsd.rd
@@ -28,4 +28,5 @@ kernels: bootblocks ${ALL_KERNELS}
 
 MDEXT+=	miniroot-am335x-${OSrev}.fs miniroot-beagle-${OSrev}.fs \
 	miniroot-cubie-${OSrev}.fs miniroot-cubox-${OSrev}.fs \
-	miniroot-nitrogen-${OSrev}.fs miniroot-panda-${OSrev}.fs
+	miniroot-nitrogen-${OSrev}.fs miniroot-panda-${OSrev}.fs \
+	miniroot-wandboard-${OSrev}.fs

src/etc/etc.armv7/disktab

@@ -1,10 +1,10 @@
-# $OpenBSD: disktab,v 1.1 2013/09/04 16:53:40 patrick Exp $
+# $OpenBSD: disktab,v 1.2 2015/08/01 00:15:37 jsg Exp $
 
 # Leave nc=16; adjust size using: ns
 rdroot|ramdiskroot|RAM-disk root FS image:\
-	:ty=simulated:se#512:nc#16:nt#2:ns#256:\
-	:ta=4.2BSD:oa#0:pa#8192:fa#512:ba#4096:\
-	:ob#0:pb#0:oc#0:pc#8192:
+	:ty=simulated:se#512:nc#16:nt#2:ns#320:\
+	:ta=4.2BSD:oa#0:pa#10240:fa#512:ba#4096:\
+	:ob#0:pb#0:oc#0:pc#10240:
 
 
 rdroot2.5M|ramdiskroot2.5M|RAM-disk root FS image:\