cxgb4: Avoid removal of uninserted tid

During ARP failure, tid is not inserted but _c4iw_free_ep()
attempts to remove tid which results in error.
This patch fixes the issue by avoiding removal of uninserted tid.

Fixes: 59437d78 ("cxgb4/chtls: fix ULD connection failures due to wrong TID base")
Signed-off-by: Anumula Murali Mohan Reddy <anumula@chelsio.com>
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Link: https://patch.msgid.link/20250103092327.1011925-1-anumula@chelsio.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>