RDMA/mana_ib: cleanup the usage of mana_gd_send_request()

RDMA/mana_ib: cleanup the usage of mana_gd_send_request()

Do not check the status of the response header returned by mana_gd_send_request(),
as the returned error code already indicates the request status.

The mana_gd_send_request() may return no error code and have the response status
GDMA_STATUS_MORE_ENTRIES, which is a successful completion. It is used
for checking the correctness of multi-request operations, such as creation of
a dma region with mana_ib_gd_create_dma_region().

Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
Link: https://patch.msgid.link/20260318173939.1417856-1-kotaranov@linux.microsoft.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>