Move the miidevs.h build stuff to conf/files so that config(8) doesn't

clobber it each time.
XXX: maybe this should be 'optional miibus' rather than 'standard'

sys/conf/files

@@ -30,6 +30,11 @@ aic79xx_{seq.h,reg.h,reg_print.c}	optional ahd pci		   \
 aic79xx_reg_print.o		optional ahd pci ahd_reg_pretty_print	   \
 	compile-with	"${NORMAL_C}"					   \
 	no-implicit-rule local
+miidevs.h			standard				   \
+	dependency	"$S/tools/devlist2h.awk $S/dev/mii/miidevs"	   \
+	compile-with	"${AWK} -f $S/tools/devlist2h.awk $S/dev/mii/miidevs" \
+	no-obj no-implicit-rule						   \
+	clean		"miidevs.h"
 kern/device_if.m		standard
 kern/bus_if.m			standard
 kern/clock_if.m			optional genclock

sys/conf/kern.post.mk

@@ -50,9 +50,6 @@ ${mfile:T:S/.m$/.h/}: ${mfile}
 	${AWK} -f $S/tools/makeobjops.awk ${mfile} -h
 .endfor
 
-miidevs.h: $S/tools/devlist2h.awk $S/dev/mii/miidevs
-	${AWK} -f $S/tools/devlist2h.awk $S/dev/mii/miidevs
-
 .if !exists(.depend)
 acphy.o amphy.o bmtphy.o brgphy.o dcphy.o e1000phy.o exphy.o if_bge.o if_tx.o \
 inphy.o lxtphy.o nsgphy.o nsphy.o pnaphy.o pnphy.o qsphy.o rlphy.o tdkphy.o \
@@ -62,7 +59,7 @@ tlphy.o xmphy.o: miidevs.h
 kernel-clean:
 	rm -f *.o *.so *.So *.ko *.s eddep errs \
 	      ${FULLKERNEL} ${KERNEL_KO} linterrs makelinks tags \
-	      miidevs.h vers.c vnode_if.c vnode_if.h \
+	      vers.c vnode_if.c vnode_if.h \
 	      ${MFILES:T:S/.m$/.c/} ${MFILES:T:S/.m$/.h/} \
 	      ${CLEAN}