disp: msm: update topology based on clock requirement

Update the topology allocation by considering the required
mode clock (vtotal x htotal x fps * fudge factor). Modes with
a clock that exceeds the maximum SDE clock will be denoted as
requiring a topology that uses two layer mixers.

Change-Id: I3c773598b0d79cb6fea9d3a0e04d89ff84d67e13
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>

msm/msm_drv.h

@@ -1029,4 +1029,8 @@ static inline unsigned long timeout_to_jiffies(const ktime_t *timeout)
 	return remaining_jiffies;
 }
 
+int msm_get_mixer_count(struct msm_drm_private *priv,
+		const struct drm_display_mode *mode,
+		const struct msm_resource_caps_info *res, u32 *num_lm);
+
 #endif /* __MSM_DRV_H__ */