tools: labs: qemu: Fix console for ARM platform

Prepare support for our first ARM platform: i.MX6ul. First we need
to fix the console file name.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>

Author: dbaluta

tools/labs/qemu/Makefile

@@ -60,7 +60,7 @@ gdb: $(ZIMAGE)
 
 $(YOCTO_IMAGE):
 	wget $(YOCTO_URL)/$(YOCTO_IMAGE)
-	sudo qemu/prepare-image.sh $(YOCTO_IMAGE)
+	sudo ARCH=$(ARCH) qemu/prepare-image.sh $(YOCTO_IMAGE)
 
 tap0:
 	qemu/create_net.sh $@

tools/labs/qemu/prepare-image.sh

@@ -11,7 +11,11 @@ TMP=$(mktemp -d)
 mount -t ext4 -o loop $1 $TMP
 
 # add console
-echo "hvc0:12345:respawn:/sbin/getty 115200 hvc0" >> $TMP/etc/inittab
+if [ "$ARCH" = "x86" ]; then
+    echo "hvc0:12345:respawn:/sbin/getty 115200 hvc0" >> $TMP/etc/inittab
+else
+    echo "mxc0:12345:respawn:/sbin/getty 115200 ttymxc0" >> $TMP/etc/inittab
+fi
 
 # add more vty
 cat >> $TMP/etc/inittab <<EOF