psplash: fix init script to avoid running the app without fb

This is a clone from the original psplash recipe init script
but with the added fix:

	@@ -25,5 +25,7 @@
	        read rotation < /etc/rotation
	 fi

	-/usr/bin/psplash --angle $rotation &
	+if [ -c "${FBDEV:-/dev/fb0}" ]; then
	+       /usr/bin/psplash --angle $rotation &
	+fi

which avoids running the application when there is no framebuffer
in the system. This prevents the following error message during
boot:

	Error opening /dev/fb0: No such file or directory

Signed-off-by: Hector Palacios <hector.palacios@digi.com>

https://jira.digi.com/browse/DEL-2747

meta-digi-dey/recipes-core/psplash/files/psplash-init

@@ -0,0 +1,31 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:             psplash
+# Required-Start:
+# Required-Stop:
+# Default-Start:        S
+# Default-Stop:
+### END INIT INFO
+
+read CMDLINE < /proc/cmdline
+for x in $CMDLINE; do
+        case $x in
+        psplash=false)
+		echo "Boot splashscreen disabled"
+		exit 0;
+                ;;
+        esac
+done
+
+export TMPDIR=/mnt/.psplash
+mount tmpfs -t tmpfs $TMPDIR -o,size=40k
+
+rotation=0
+if [ -e /etc/rotation ]; then
+	read rotation < /etc/rotation
+fi
+
+if [ -c "${FBDEV:-/dev/fb0}" ]; then
+	/usr/bin/psplash --angle $rotation &
+fi
+