With the intel_modeset_* probe functions clarified, we can continue with
moving more related calls to the right layer:

- drm_vblank_init()
- intel_bios_init()
- intel_vga_register()
- intel_csr_ucode_init()

Unfortunately, for the time being, we also need to move a call to the
*wrong* layer: the power domain init.

No functional changes.

v2: move probe failure while at it, power domain init

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/da229ffbed64983f002605074533c8b2878d17ee.1599056955.git.jani.nikula@intel.com