package/dhcpcd: add udev optional dependency

udev is an optional dependency (enabled by default) since version 6.1.0:
https://github.com/rsmarples/dhcpcd/commit/12bbc8cb5c7507be15a7e0af4140c3d81125c46c

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 580eac946886d04afa0d14e8cc90bd24bb10e191)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/dhcpcd/dhcpcd.mk

@@ -16,6 +16,13 @@ DHCPCD_CONFIG_OPTS = \
 	--os=linux \
 	--privsepuser=dhcpcd
 
+ifeq ($(BR2_PACKAGE_HAS_UDEV),y)
+DHCPCD_CONFIG_OPTS += --with-udev
+DHCPCD_DEPENDENCIES += udev
+else
+DHCPCD_CONFIG_OPTS += --without-udev
+endif
+
 ifeq ($(BR2_STATIC_LIBS),y)
 DHCPCD_CONFIG_OPTS += --enable-static
 endif