staging: vt6656 remove vnt_mac_disable_keyentry calls

It is not necessary to disable all the keys mac80211 will
have removed any existing keys that were used.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/844df68d-08e2-7672-524f-42b918e300c1@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>