ARM: defconfig: u8500: activate cpufreq

This activates the device tree-based cpufreq driver that
Ux500 is using and enables the schedutil and ondemand
governors with schedutil as default. This works fine in
the setups I have tested.

Link: https://lore.kernel.org/r/20191217202648.23206-1-linus.walleij@linaro.org
Cc: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/configs/u8500_defconfig

@@ -12,7 +12,9 @@ CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_CMDLINE="root=/dev/ram0 console=ttyAMA2,115200n8"
 CONFIG_CPU_FREQ=y
-CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
+CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y
+CONFIG_CPU_FREQ_GOV_ONDEMAND=y
+CONFIG_CPUFREQ_DT=y
 CONFIG_CPU_IDLE=y
 CONFIG_ARM_U8500_CPUIDLE=y
 CONFIG_VFP=y