[PATCH net] tools: ynl: add header guards for nlctrl

[Jakub Kicinski <kuba@kernel.org>]

I "extracted" YNL C into a GitHub repo to make it easier
to use in other projects: https://github.com/linux-netdev/ynl-c

GitHub actions use Ubuntu by default, and the kernel headers
there are missing f329a0ebeaba ("genetlink: correct uAPI defines").
Add the direct include workaround for nlctrl.

Fixes: 768e044a5fd4 ("doc/netlink/specs: Add spec for nlctrl netlink family")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
The Fixes tag is a bit unfair here, we never promised very
old headers will work. At the same time Ubuntu may be fairly
popular so seems worth making it work.
---
CC: jiri@resnulli.us
CC: chuck.lever@oracle.com
CC: donald.hunter@gmail.com
---
 tools/net/ynl/Makefile.deps | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/net/ynl/Makefile.deps b/tools/net/ynl/Makefile.deps
index 07373c5a7afe..f4e8eb79c1b8 100644
--- a/tools/net/ynl/Makefile.deps
+++ b/tools/net/ynl/Makefile.deps
@@ -20,6 +20,7 @@ CFLAGS_ethtool:=$(call get_hdr_inc,_LINUX_ETHTOOL_NETLINK_H_,ethtool_netlink.h)
 CFLAGS_handshake:=$(call get_hdr_inc,_LINUX_HANDSHAKE_H,handshake.h)
 CFLAGS_mptcp_pm:=$(call get_hdr_inc,_LINUX_MPTCP_PM_H,mptcp_pm.h)
 CFLAGS_netdev:=$(call get_hdr_inc,_LINUX_NETDEV_H,netdev.h)
+CFLAGS_nlctrl:=$(call get_hdr_inc,__LINUX_GENERIC_NETLINK_H,genetlink.h)
 CFLAGS_nfsd:=$(call get_hdr_inc,_LINUX_NFSD_NETLINK_H,nfsd_netlink.h)
 CFLAGS_ovs_datapath:=$(call get_hdr_inc,__LINUX_OPENVSWITCH_H,openvswitch.h)
 CFLAGS_ovs_flow:=$(call get_hdr_inc,__LINUX_OPENVSWITCH_H,openvswitch.h)
-- 
2.44.0