Skip PNP probes. If there are isapnp or pnpbios instances of this driver,

then we can support them later.  This keeps the pbio probe from claiming
lots of otherwise unused pnpbios devices on my laptop.

sys/dev/pbio/pbio.c

@@ -49,6 +49,7 @@ __FBSDID("$FreeBSD$");
 #include <dev/pbio/pbioio.h>		/* pbio IOCTL definitions */
 #include <sys/uio.h>
 #include <sys/fcntl.h>
+#include <isa/isavar.h>
 
 /* Function prototypes (these should all be static) */
 static	d_open_t	pbioopen;
@@ -168,6 +169,8 @@ pbioprobe(device_t dev)
 	unsigned char val;
 #endif
 
+	if (isa_get_logicalid(dev))		/* skip PnP probes */
+		return (ENXIO);
 	rid = 0;
 	scp->res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
 	    0, ~0, IO_PBIOSIZE, RF_ACTIVE);