drm/i915/dsi: improve dphy param limits logging

drm/i915/dsi: improve dphy param limits logging

Move the limit checks near the calculations for each field, and actually
log the values that exceed limits.

Cc: Ville Syrjälä <[email protected]>
Reviewed-by: Ville Syrjälä <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]