Fix character case in examples for "camcontrol security" - should be
"-U user" not "-u user".

PR:		193179
Submitted by:	milios ccsys com
MFC after:	3 days
Provide pointer from struct ifnet to struct netmap_adapter,
instead of abusing spare field.
It is actually possible to have if_t a typedef to non-void type,
and keep both converted to drvapi and non-converted drivers
compilable.

o Make if_t typedef to struct ifnet *.
o Remove shim functions.

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
Toss fields so that no padding field is required to achieve alignment.
The Marvell PJ4B cpu family is armv7, not armv6.
Put option FDT into the base IMX6 config and remove it from the config
of boards based on IMX6.