soc: qcom: socinfo: Handle EPROBE_DEFER from SMEM

The SMEM driver may return EPROBE_DEFER to indicate it is currently not
ready to handle client requests.  socinfo does not check for this error,
and may attempt to dereference an invalid pointer.

Amend the SMEM return checks in socinfo to also check for EPROBE_DEFER.

Change-Id: Ibb8786e5696a8e370efbc1453f45ea1f4465ee5d
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>