universal7904: rootdir: Allow telephony access to proc/cmdline

`D/TelephonyManager(  131): No /proc/cmdline exception=java.io.FileNotFoundException: /proc/cmdline: open failed: EACCES (Permission denied)`

Change-Id: I2685959d485be3e29a738bc6287fdd99dc52b771
Signed-off-by: SamarV-121 <samarvispute121@gmail.com>
diff --git a/rootdir/etc/init.exynos7904.rc b/rootdir/etc/init.exynos7904.rc
index ed1c29d..9308a03 100644
--- a/rootdir/etc/init.exynos7904.rc
+++ b/rootdir/etc/init.exynos7904.rc
@@ -398,6 +398,9 @@
     chmod 0660 /sys/class/sec/switch/uart_sel
     chown system system /sys/class/sec/switch/uart_sel
 
+# Prevents permission denied error for telephony
+    chmod 0644 /proc/cmdline
+
 on fs
     mount_all /vendor/etc/fstab.${ro.hardware}
     # We need to seperate mounting SEC_EFS partition from fstab file due to GSI image loading case