intel_adsp: fix new style twister configuration

Missed a few keys while moving to the new style twister.yaml file for
the intel_adsp platform. Add those back.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

Author: nashif

boards/intel/adsp/twister.yaml

@@ -17,9 +17,23 @@ variants:
       - xt-clang
   intel_adsp/ace30:
     twister: false
+  intel_adsp/ace20_lnl/sim:
+    type: sim
+    simulation: custom
+    testing:
+      timeout_multiplier: 4
+  intel_adsp/ace15_mtpm/sim:
+    type: sim
+    simulation: custom
+    testing:
+      timeout_multiplier: 4
   intel_adsp/ace30/ptl/sim:
+    type: sim
+    simulation: custom
     toolchain:
       - xt-clang
+    testing:
+      timeout_multiplier: 8
   intel_adsp/cavs25:
     toolchain:
       - xcc