cpufreq/amd-pstate: fix setting policy current frequency value

When scaling min/max freq values were being setted,
the value of policy->cur need to update.

Signed-off-by: Meng Li <li.meng@amd.com>
Acked-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20240227071133.3405003-1-li.meng@amd.com


Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>