autoconf: use include directives instead of recursing down udev

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13316

Makefile.am

@@ -24,7 +24,7 @@ include $(srcdir)/%D%/lib/Makefile.am
 include $(srcdir)/%D%/man/Makefile.am
 include $(srcdir)/%D%/scripts/Makefile.am
 if BUILD_LINUX
-SUBDIRS += udev
+include $(srcdir)/%D%/udev/Makefile.am
 endif
 endif
 CPPCHECKDIRS += module

configure.ac

@@ -290,8 +290,6 @@ AC_CONFIG_FILES([
 	tests/zfs-tests/tests/perf/regression/Makefile
 	tests/zfs-tests/tests/perf/scripts/Makefile
 	tests/zfs-tests/tests/stress/Makefile
-	udev/Makefile
-	udev/rules.d/Makefile
 	zfs.release
 ])
 

udev/Makefile.am

@@ -1 +1,6 @@
-SUBDIRS = rules.d
+udevrule_DATA = \
+	%D%/rules.d/69-vdev.rules \
+	%D%/rules.d/60-zvol.rules \
+	%D%/rules.d/90-zfs.rules
+
+SUBSTFILES += $(udevrule_DATA)

udev/rules.d/Makefile.am

@@ -1,10 +0,0 @@
-CLEANFILES =
-EXTRA_DIST =
-include $(top_srcdir)/config/Substfiles.am
-
-udevrule_DATA = \
-	69-vdev.rules \
-	60-zvol.rules \
-	90-zfs.rules
-
-SUBSTFILES += $(udevrule_DATA)