disp: msm: sde: remove unused functions from sde code

Cleanup unused functions from all modules in sde driver.

Change-Id: Ia0e72ab9c281b4200a63ce35bf184e83fe1db5d2
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>

msm/sde/sde_rm.h

@@ -397,18 +397,6 @@ bool sde_rm_topology_is_group(struct sde_rm *rm,
 		struct drm_crtc_state *state,
 		enum sde_rm_topology_group group);
 
-/**
- * sde_rm_ext_blk_create_reserve - Create external HW blocks
- *	in resource manager and reserve for specific encoder.
- * @rm: SDE Resource Manager handle
- * @hw: external HW block
- * @drm_enc: DRM Encoder handle
- * @Return: 0 on Success otherwise -ERROR
- */
-int sde_rm_ext_blk_create_reserve(struct sde_rm *rm,
-				struct sde_hw_blk *hw,
-				struct drm_encoder *enc);
-
 /**
  * sde_rm_ext_blk_destroy - Given the encoder for the display chain, release
  *	external HW blocks created for that.