staging: wilc1000: change the type of wilc1000_initialized

This patch changes the type of wilc1000_initialized in the struc wilc from int
to bool and also renames it to the initialized. In addition, unnecessary
wilc1000_initialized codes are removed in this patch.

Signed-off-by: Tony Cho <tony.cho@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>