[PATCH] staging: wimax: depends on NET

Fix build errors when CONFIG_NET is not enabled. E.g. (trimmed):

ld: drivers/staging/wimax/op-msg.o: in function `wimax_msg_alloc':
op-msg.c:(.text+0xa9): undefined reference to `__alloc_skb'
ld: op-msg.c:(.text+0xcc): undefined reference to `genlmsg_put'
ld: op-msg.c:(.text+0xfc): undefined reference to `nla_put'
ld: op-msg.c:(.text+0x168): undefined reference to `kfree_skb'
ld: drivers/staging/wimax/op-msg.o: in function `wimax_msg_data_len':
op-msg.c:(.text+0x1ba): undefined reference to `nla_find'
ld: drivers/staging/wimax/op-msg.o: in function `wimax_msg_send':
op-msg.c:(.text+0x311): undefined reference to `init_net'
ld: op-msg.c:(.text+0x326): undefined reference to `netlink_broadcast'
ld: drivers/staging/wimax/stack.o: in function `__wimax_state_change':
stack.c:(.text+0x433): undefined reference to `netif_carrier_off'
ld: stack.c:(.text+0x46b): undefined reference to `netif_carrier_on'
ld: stack.c:(.text+0x478): undefined reference to `netif_tx_wake_queue'
ld: drivers/staging/wimax/stack.o: in function `wimax_subsys_exit':
stack.c:(.exit.text+0xe): undefined reference to `genl_unregister_family'
ld: drivers/staging/wimax/stack.o: in function `wimax_subsys_init':
stack.c:(.init.text+0x1a): undefined reference to `genl_register_family'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: netdev@vger.kernel.org
---
 drivers/staging/wimax/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20201102.orig/drivers/staging/wimax/Kconfig
+++ linux-next-20201102/drivers/staging/wimax/Kconfig

@@ -5,6 +5,7 @@
 
 menuconfig WIMAX
 	tristate "WiMAX Wireless Broadband support"
+	depends on NET
 	depends on RFKILL || !RFKILL
 	help