staging: wilc1000: remove unnecessary parentheses in host_int_remove_wep_key

This patch removes unnecessary parentheses in host_int_remove_wep_key
found by checkpatch.

CHECK: Unnecessary parentheses around wfi_drv->hSemTestKeyBlock
FILE: drivers/staging/wilc1000/host_interface.c:4320:

Signed-off-by: Chaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>