net: emaclite: Add missing linux/interrupt.h header

net: emaclite: Add missing linux/interrupt.h header

Log:
drivers/net/xilinx_emaclite.c: In function 'xemaclite_open':
drivers/net/xilinx_emaclite.c:961: error: implicit declaration of function 'request_irq'
drivers/net/xilinx_emaclite.c: In function 'xemaclite_close':
drivers/net/xilinx_emaclite.c:995: error: implicit declaration of function 'free_irq'
make[2]: *** [drivers/net/xilinx_emaclite.o] Error 1
make[1]: *** [drivers/net] Error 2
make: *** [drivers] Error 2

Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>