ARM: dts: msm: make DisplayPort crypto clock standalone on SDM845

Make the DisplayPort crypto clock a standalone clock by removing
it from the controller clock group. This change is required on
SDM845 because the crypto clock enable/disable is triggered by
the link clock, and the only requirement is for the clock's rate
to be set.

CRs-Fixed: 2020938
Change-Id: I7e91a8ad8c5c7a2cdfa2ae0e9521b1bbc168f67e
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>