[PATCH net v2] net/iucv: descend into net/iucv independently of IUCV

AFIUCV can be enabled as either built-in or a module through QETH_L3 even
when IUCV is disabled. The top-level net Makefile currently descends into
net/iucv/ only under CONFIG_IUCV, so the valid configurations
CONFIG_AFIUCV=y/m with CONFIG_IUCV=n never consider af_iucv.o.

Always descend into net/iucv/. Its Makefile already gates iucv.o and
af_iucv.o on their own Kconfig symbols, so this does not build either
object unless selected.

Fixes: c69748d1c9b5 ("iucv: kernel option for z/VM IUCV and HiperSockets")
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>

Assisted-by: Codex:gpt-5
Signed-off-by: Pengpeng Hou <redacted>
---
Changes since RFC:
https://lore.kernel.org/all/20260625061303.36326-1-pengpeng@iscas.ac.cn/ (local)
- submit this as a regular fix rather than an RFC
- describe both AFIUCV=y and AFIUCV=m with IUCV=n
- add Alexandra's Reviewed-by

 net/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/Makefile b/net/Makefile
index 5b2dd7f07a85..c0da946b281e 100644
--- a/net/Makefile
+++ b/net/Makefile

@@ -45,7 +45,7 @@ obj-$(CONFIG_WIRELESS)		+= wireless/
 obj-$(CONFIG_MAC80211)		+= mac80211/
 obj-$(CONFIG_TIPC)		+= tipc/
 obj-$(CONFIG_NETLABEL)		+= netlabel/
-obj-$(CONFIG_IUCV)		+= iucv/
+obj-y				+= iucv/
 obj-$(CONFIG_SMC)		+= smc/
 obj-$(CONFIG_RFKILL)		+= rfkill/
 obj-$(CONFIG_NET_9P)		+= 9p/

-- 
2.50.1 (Apple Git-155)