dropbear: Add enable-x11-forwarding PACKAGECONFIG option

Add the option to enable X11 forwarding in dropbear with a new
PACKAGECONFIG option ('enable-x11-forwarding'). Method uses
localoption.h file for dropbear feature selection.

Add backport patch to fix X11 forwarding in the current 2022.82
version.

Signed-off-by: Daniel Gomez <daniel@qtec.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>