msm: sde: fix kernel booting failure in sde driver

This issue is caused by change 1974734. With that change, kernel
booting will fail in sde driver.

[drm:sde_wb_drm_init:601] [sde error]invalid params
[drm:_sde_kms_setup_displays:691] [sde error]wb bridge 0 init failed, -22
[drm:_sde_init_phy_plane:2663] [sde error][5]no valid formats for plane
[drm:sde_plane_init:2746] [sde error]_sde_init_phy_plane error vp=0
[drm:_sde_kms_drm_obj_init:861] [sde error]sde_plane_init failed
[drm:sde_kms_hw_init:1288] [sde error]modeset init failed: -22
msm_drm 900000.qcom,mdss_mdp: kms hw init failed: -22

sblk->format_list should be put back to _sde_sspp_setup_vig,
_sde_sspp_setup_rgb, _sde_sspp_setup_cursor,_sde_sspp_setup_dma and
sde_wb_parse_dt, otherwise, it will fail when populating the pixel
format which pipe supported in sde_plane_init.

Change-Id: I479886d7d7e676a10f8a26bd372aad847dd03163
Signed-off-by: Guchun Chen <guchunc@codeaurora.org>