drivers/acpi/power_meter.c:995: error: implicit declaration of function 'dmi_check_system'

Cc: Darrick J. Wong <djwong@us.ibm.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>