soc: qcom: smem_log: Move memcpy_to_log out from CONFIG_DEBUG_FS

memcpy_to_log is used even when CONFIG_DEBUG_FS is disabled. Move
it out from under the config.

Change-Id: I9e694d15809393c473d05897de58f8d862455086
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>