msm: ipa: continue probe on ipc log failure

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

Change-Id: I1ac1765e1df8cb1ea5f19a7ec639b307d867a28a
CRs-Fixed: 2028149
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>