msm: gsi: continue probe on ipc log failure

Do not fail GSI probe function if IPC logging is not available.

Change-Id: Icdccb9a8db637fc9c4fcff5f459831739c675173
CRs-Fixed: 2028149
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>