media: rc: add missing MODULE_DESCRIPTION() macro

With ARCH=x86, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/media/rc/rc-core.o

Add the missing invocation of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/rc/rc-main.c

@@ -2092,4 +2092,5 @@ subsys_initcall(rc_core_init);
 module_exit(rc_core_exit);
 
 MODULE_AUTHOR("Mauro Carvalho Chehab");
+MODULE_DESCRIPTION("Remote Controller core module");
 MODULE_LICENSE("GPL v2");