hostap-conf: remove dependencies of update-modules

hostap-conf: remove dependencies of update-modules

Also:
 * install the alias file in the correct /etc/modprobe.d directory since
   this is the directory used by modprobe now;
 * rewrite the alias file to be up-to-date with modprobe's syntax;
 * remove the postinst/postrm scriptlets because this is just an alias
   file;

[YOCTO #3598]

(From OE-Core rev: 427010fd289534d4b4af0bfd74419a4ad0eb5a39)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>