drm/amd/pm: correct the name of one function for vangogh

This patch is to correct the name of one function for vangogh.
This function is used to print the clock levels of all kinds of IP
components.

Signed-off-by: Xiaojian Du <Xiaojian.Du@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>