msm: mdss: add dynamic resolution switch support for DSC panels

Reconfigure the DSC parameters and DSI stream according to the
new resolution. Mandate the first frame after dynamic resolution
change for DSC panels to be full frame updates. Send PPS command
based on the device tree entry before or after the switch commands.
Fix device tree parsing of DSC parameters within the switch timing
node. Add sub-nodes in target specific device tree to configure
target specific timing and switch commands.

Change-Id: I6aa5f8f972b16645b219bf6274036b6e5dac6dda
[veeras@codeaurora.org: Resolved conflicts in mdss_dsi_panel.c and
mdss_fb.c]
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>