drm/xe/guc: Request max GT freq during resume

We already request max freq in the load path, moving it
to __xe_guc_upload will ensure this speeds up GuC load in
the resume path as well.

v2: Rename xe_guc_pc_init_early since we now call it per
GuC load (Michal W)

v3: Keep pc_init_early() and init RPx values there (Rodrigo)

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240620224928.3986377-3-vinay.belgaumkar@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>