msm: smem_log: Use smem_get_entry_to_proc()

smem_get_entry() is deprecated.  Use the replacement function,
smem_get_entry_to_proc(), instead.

Change-Id: I343448e3ffe2955d4e5274a14784ddf7b95eb8b0
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>