disp: msm: sde: add dt property for QSEED scalar HW revision

QSEED scalar block HW revision is constant for a given MDSS revision.
Both SSPP and DS HW files invoke this API to read the revision register
at various points of time. Expose this revision information through
DT binding and maintain in the catalog to avoid repeated register
reads.

Change-Id: I95c0a5242cfda0aaa4ec5c2ff5c7cc0bed191b59
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>

msm/sde/sde_hw_util.h

@@ -197,9 +197,6 @@ void sde_hw_setup_scaler3(struct sde_hw_blk_reg_map *c,
 		struct sde_hw_scaler3_cfg *scaler3_cfg, u32 scaler_version,
 		u32 scaler_offset, const struct sde_format *format);
 
-u32 sde_hw_get_scaler3_ver(struct sde_hw_blk_reg_map *c,
-		u32 scaler_offset);
-
 void sde_hw_csc_matrix_coeff_setup(struct sde_hw_blk_reg_map *c,
 		u32 csc_reg_off, struct sde_csc_cfg *data,
 		u32 shift_bit);