disp: msm: sde: add capability flag for trusted VM support

Add a new hw catalog flag to indicate target support for
trusted VM. Currently, the flags is set for Lahaina target.

Change-Id: Idb56492758ef580673b2ebf44fecd577a2876f1b
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>