drm/i915: Add a separate definition for PIPE_CRC_RES_HSW

drm/i915: Add a separate definition for PIPE_CRC_RES_HSW

On hsw+ we only have one CRC result register, instead of the
five we have on ivb, and some of the others have been repurposed
to serve other CRC related purposes.

Since the hsw+ vs. pre-hsw register operate quite differently
let's add a separate definition for the hsw+ variant to make the
situation a bit more clear. Also since we only use this from a
hsw+ codepath there is no real benefit to be had with reusing
the ivb register definition.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240531115342.2763-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>