RDMA/hfi1: Fix error return code in parse_platform_config()

RDMA/hfi1: Fix error return code in parse_platform_config()

[ Upstream commit aea4d159d0c2eb4c79d73eadc03ffd32ec539ff6 ]

In the previous iteration of the while loop, the "ret" may have been
assigned a value of 0, so the error return code -EINVAL may have been
incorrectly set to 0. To fix set valid return code before calling to
goto.

Fixes: 6067b6a0236a ("staging/rdma/hfi1: Tune for unknown channel if configuration file is absent")
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Link: https://lore.kernel.org/r/1669953638-11747-1-git-send-email-wangyufen@huawei.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>