net: team: rename team to team_core for linking

Similar with commit 08d32323 ("net: fou: rename the source for linking"),
We'll need to link two objects together to form the team module.
This means the source can't be called team, the build system expects
team.o to be the combined object.
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240401031004.1159713-3-liuhangbin@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/team/Makefile

@@ -3,6 +3,7 @@
 # Makefile for the network team driver
 #
 
+team-y:= team_core.o
 obj-$(CONFIG_NET_TEAM) += team.o
 obj-$(CONFIG_NET_TEAM_MODE_BROADCAST) += team_mode_broadcast.o
 obj-$(CONFIG_NET_TEAM_MODE_ROUNDROBIN) += team_mode_roundrobin.o