drm/i915/scaler: unloop scaler readout that is run once

drm/i915/scaler: unloop scaler readout that is run once

Most of the loop's code is run once because of the continue statement at
it's start and break statement at it's end. Kick it out of the loop.

While at it, skl_scaler_get_config()'s loop is skipped when specified
condition is met and broken when the condition is not met. Equivalently,
invert the condition and break the loop.

Changelog:
v2->v3
- keep ctl inside the loop (Ville)

Cc: Nemesa Garg <nemesa.garg@intel.com>
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Michał Grzelak <michal.grzelak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260509164048.627399-8-michal.grzelak@intel.com