disp: msm: sde: add support for noise layer

DPU has added support for noise injection into the layer stack. Change
adds support for noise layer programming and exposes the hardware block
to the user space modules.

Change-Id: Id176eea54fcdcd5d399457b14133a1ccde07299f

msm/sde/sde_hw_lm.h

@@ -81,6 +81,10 @@ struct sde_hw_lm_ops {
 	/* collect_misr: reads and stores MISR data from HW register */
 	int (*collect_misr)(struct sde_hw_mixer *ctx, bool nonblock,
 			u32 *misr_value);
+
+	/* setup_noise_layer: enables/disables noise layer */
+	int (*setup_noise_layer)(struct sde_hw_mixer *ctx,
+		struct sde_hw_noise_layer_cfg *cfg);
 };
 
 struct sde_hw_mixer {