Add missing kernel config symbol probably some dependency uncovered by my local perf related and enabled kernel config options. ARM PMU framework (ARM_PMU) [Y/n/?] y Freescale i.MX8 DDR perf monitor (FSL_IMX8_DDR_PMU) [N/m/y/?] (NEW) Signed-off-by: Petr Štetiar <ynezz@true.cz>