cpufreq/amd-pstate: Drop debug statements for policy setting

There are trace events that exist now for all amd-pstate modes that
will output information right before programming to the hardware.

This makes the existing debug statements unnecessary remaining
overhead.  Drop them.

Reviewed-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>