Staging: arlan: arlan.h: more Checkpatch cleanup

ERROR: do not use C99 // comments
+      volatile	u_char radioModule;// shows EEPROM, can be overridden at 0x111

ERROR: do not use C99 // comments
+      volatile	u_char defaultChannelSet; // shows EEProm, can be overriiden at 0x10A

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>