update_cpu_features: Don't set trustzone on cortex-m85.

cortex-m85 already has 8msecext, which is not the same as trustzone. The former
is for the M profile, while the latter is for the A profile.

Revert of a small part of ziglang#18498.

Author: alexrp

tools/update_cpu_features.zig

@@ -483,7 +483,6 @@ const llvm_targets = [_]LlvmTarget{
             .{
                 .llvm_name = "cortex-m85",
                 .omit_deps = &.{ "mve_fp", "pacbti", "fp_armv8d16" },
-                .extra_deps = &.{"trustzone"},
             },
             .{
                 .llvm_name = "cortex-x1c",