drm/i915/dp: Fix link compute m_n calc for DSC

Fix the intel_link_compute_m_n in case of display stream
compression. This patch passes the compressed_bpp to
intel_link_compute_m_n if compression is enabled.

Fixes: a4a157777c80 ("drm/i915/dp: Compute DSC pipe config in atomic check")
Cc: Ville Syrjala <[e-mail]>
Cc: Anusha Srivatsa <[e-mail]>
Signed-off-by: Manasi Navare <[e-mail]>
Reviewed-by: Ville Syrjälä <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/intel_dp.c

···
 				       &pipe_config->dp_m_n,
 				       constant_n);
 	else
-		intel_link_compute_m_n(pipe_config->dsc_params.compression_enable,
+		intel_link_compute_m_n(pipe_config->dsc_params.compressed_bpp,
 				       pipe_config->lane_count,
 				       adjusted_mode->crtc_clock,
 				       pipe_config->port_clock,