irda-utils: fix for read-only rootfs

The init script for irda writes configuration items to /etc/sysconfig/irda
if that file is not available in system. But it's actually not necessary,
the behavior doesn't change whether the init script writes to the file or not.

Considering it issues error messages in case of a read-only rootfs, I delete
the writing process.

[YOCTO #4103]
[YOCTO #4886]

(From OE-Core rev: f88a101bc0caa7b486527f0d337406651cbaeb0d)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/irda-utils/irda-utils-0.9.18/init

@@ -13,7 +13,6 @@ module_id() {
 }
 
 if [ ! -f /etc/sysconfig/irda ]; then
-
     case `module_id` in
 	"HP iPAQ H2200" | "HP iPAQ HX4700" | "HTC Universal")
 	    IRDA=yes
@@ -28,18 +27,10 @@ if [ ! -f /etc/sysconfig/irda ]; then
 	    DISCOVERY=
 	    ;;
     esac
-
-    mkdir -p /etc/sysconfig
-    echo "IRDA=$IRDA" > /etc/sysconfig/irda
-    if [ $IRDA = "yes" ]; then
-	echo "DEVICE=$DEVICE" >> /etc/sysconfig/irda
-	echo "DONGLE=$DONGLE" >> /etc/sysconfig/irda
-	echo "DISCOVERY=$DISCOVERY" >> /etc/sysconfig/irda
-    fi
+else
+    . /etc/sysconfig/irda
 fi
 
-. /etc/sysconfig/irda
-
 # Check that irda is up.
 [ ${IRDA} = "no" ] && exit 0