ewrk3: silence GCC warning

Building ewrk3.o triggers this GCC warning:
    drivers/net/ethernet/dec/ewrk3.c: In function '__check_irq':
    drivers/net/ethernet/dec/ewrk3.c:1915:1: warning: return from incompatible pointer type [enabled by default]

This can be trivially fixed by changing the 'irq' parameter from int to
byte (which is an alias for unsigned char for module parameters).
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/dec/ewrk3.c

@@ -1912,7 +1912,7 @@ static int io[MAX_NUM_EWRK3S+1] = { 0x300, 0, };
 
 /* '21' below should really be 'MAX_NUM_EWRK3S' */
 module_param_array(io, int, NULL, 0);
-module_param_array(irq, int, NULL, 0);
+module_param_array(irq, byte, NULL, 0);
 MODULE_PARM_DESC(io, "EtherWORKS 3 I/O base address(es)");
 MODULE_PARM_DESC(irq, "EtherWORKS 3 IRQ number(s)");