ARM: dts: msm: Change Truly FHD ctrl and phy index

To be able to use the Truly panel as a default panel, the panel
should use DSI Controller 0 and DSI PHY 0.

Change-Id: I8470afec1bbc91e9f79af9d867fb198e6ba49dc9
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>