initial buildroot for linux 5.15

package/busybox/mdev.conf

@@ -0,0 +1,39 @@
+# null may already exist; therefore ownership has to be changed with command
+null		root:root 666 @chmod 666 $MDEV
+zero		root:root 666
+full		root:root 666
+random		root:root 444
+urandom		root:root 444
+hwrandom	root:root 444
+grsec		root:root 660
+
+kmem		root:root 640
+mem		root:root 640
+port		root:root 640
+# console may already exist; therefore ownership has to be changed with command
+console		root:tty 600 @chmod 600 $MDEV
+ptmx		root:tty 666
+pty.*		root:tty 660
+
+# Typical devices
+tty		root:tty 666
+tty[0-9]*	root:tty 660
+vcsa*[0-9]*	root:tty 660
+ttyS[0-9]*	root:root 660
+ttyUSB[0-9]*	root:root 660
+
+# alsa sound devices
+snd/pcm.*	root:audio 660
+snd/control.*	root:audio 660
+snd/midi.*	root:audio 660
+snd/seq		root:audio 660
+snd/timer	root:audio 660
+
+# input stuff
+input/event[0-9]+	root:root 640
+input/mice		root:root 640
+input/mouse[0-9]	root:root 640
+input/ts[0-9]		root:root 600
+
+# load modules
+$MODALIAS=.*	root:root 660 @modprobe "$MODALIAS"