defconfig: enable cpufreq and devfreq driver for qcs405 32 bit

Enable driver configs to enable the cpu and device scaling
on qcs405 32 bit environment.

Change-Id: I80e438fe1ef0a8aaa02348bd61b5e00e765a5511
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>