Remove CONFIG_QUALCOMM_BUG_FIX_BLENDING

This is essentialy fb blend setting via MSMFB_METADATA_SET ioctl

Change-Id: Ie68a689cfdb735c163de63abc4e7a322891f78a7
msm_fb: display: add stage commit before kickoff to WFD

Since stage commit had been splited out of stage up fucnction,
it needed to be called to stage pipes into mixer befroe
kickoff mixer. Add this function into overlay writeback for WFD.
This patch varies a little bit from the mainline patch as it got
updated again. Now making it equivalent to mainline.

(cherry picked from commit e540ed2d72f723d3b5ac7e444899921cc227ff63)

Change-Id: Ic2bf488ef61d6c31a3997906b2d70090818a9bc0
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
msm: display: fb blend setting via MSMFB_METADATA_SET ioctl

MSMFB_METADATA_SET ioctl is added for the fb user to pass
in additional infomation rather than using reserved
fields.
User can set pre-multiplied alpha for the frame buffer via this
ioctl, overlay blend setting will take this into account.

(cherry picked from commit a2505533d43169288d5508c44ec8ac968a65b82c)

Change-Id: Iba20537a07eeca6a7dffd2910fbc28836ba2f3fa
Signed-off-by: Ken Zhang <kenz@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>