staging: wilc1000: remove wrappers around sema_init()

Just call the function directly.  Also remove a pointless "deinit"
function that was empty to match the init function.

This also fixes a bug where txq_add_to_head_cs was a mutex structure
being used as a semaphore.  See the fun things that happen when you use
void pointers instead of "real" types?  Amazing that this worked at all,
someone got _very_ lucky.  Whoever "Amr" is, they really didn't fix
BugID_4720 correctly :(

Cc: Johnny Kim <johnny.kim@atmel.com>
Cc: Rachel Kim <rachel.kim@atmel.com>
Cc: Dean Lee <dean.lee@atmel.com>
Cc: Chris Park <chris.park@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>