firmware: qcom-scm: Fix formatting errors in the trace string

Fix a handful of format errors in the trace string. Use a %llx for
u64 values.

Fixes: 873f25f5 ("firmware: qcom_scm: Add trace points to scm driver")
Change-Id: Ic0dedbad69ffdb044e094bfcb4e95f848338edd0
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>