UPSTREAM: drm/i915/psr: Allow DSB usage when PSR is enabled

Now as we have correct PSR2_MAN_TRK_CTL handling in place we can allow DSB
usage also when PSR is enabled for LunarLake onwards.

v2: rebase

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250213064804.2077127-14-jouni.hogander@intel.com


(cherry picked from commit bccb18c5)

Bug: 432032023
Test: None
Change-Id: I477697c311220b700b038b36b7d94614d16a3f5f
Signed-off-by: Ap, Kamal <kamal.ap@intel.corp-partner.google.com>