staging: wilc1000: change WILC_BOOL to bool

change own data type(WILC_BOOL) to common data type(bool)
but that's contain true/false value. so change with them.

Signed-off-by: Dean Lee <dean.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>