staging: wilc1000: remove unused interrupt status handling code

Remove interrupt handling for unused interrupt status(PLL update and
Sleep). The firmware only initiates the interrupt for the data transfer
to host and rest are not used anymore.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Link: https://lore.kernel.org/r/20190910074514.3073-1-ajay.kathat@microchip.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>