msm: clock-local2: Change WARN to pr_warn to avoid stack dump

Change _WARN_printf to pr_err as former prints stack and
register dump in logs which is not necessary.

Change-Id: Ic5d81acc26bb40582fbd15d4a8eec61655063ef3
Signed-off-by: Atanas Filipov <afilipov@codeaurora.org>