Install pnpbios(4) manpage.

Submitted by:	Alexander Leidinger <Alexander@leidinger.net>

share/man/man4/man4.i386/Makefile

@@ -5,7 +5,7 @@ MAN=	aic.4 alpm.4 amdpm.4 apm.4 ar.4 asc.4 asr.4 \
 	dgb.4 el.4 en.4 ep.4 ex.4 fe.4 gsc.4 \
 	ie.4 io.4 le.4 linux.4 lnc.4 longrun.4 matcd.4 mcd.4 \
 	meteor.4 mse.4 npx.4 \
-	pcf.4 perfmon.4 pnp.4 \
+	pcf.4 perfmon.4 pnp.4 pnpbios.4 \
 	ray.4 rdp.4 scd.4 \
 	spkr.4 sr.4 streams.4 svr4.4 tw.4 \
 	tx.4 vx.4 \