msm: mdss: fix suspend resume for sharp 2k panel with dst_split

Continuous splash flag for the second dsi interface is not set
to 0 which leads to host init for the second dsi interface not
getting called.

Change-Id: Icba4820922714e3f096e93914f0d3c718c81ae62
Signed-off-by: Vineet Bajaj <vbajaj@codeaurora.org>