staging: wilc1000: make use of get_unaligned_le16/le32 to pack data

Make use of get_unaligned_le16/le32 framework api's to pack data.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>