feat(brbe): add negative test for ENABLE_BRBE_FOR_NS flag

This test ensures that an EL3 panic occurs when BRBE registers are
accessed when ENABLE_BRBE_FOR_NS=0.

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I3ea7383f9bd2b92e5efe0442f9ad346f95accc44
diff --git a/model/base-aemva-common.sh b/model/base-aemva-common.sh
index 2d02364..29251cc 100644
--- a/model/base-aemva-common.sh
+++ b/model/base-aemva-common.sh
@@ -191,6 +191,7 @@
 ${etm_present+-C cluster0.cpu3.etm-present=$etm_present}
 ${supports_trace_filter_regs+-C cluster0.has_self_hosted_trace_extension=$supports_trace_filter_regs}
 ${supports_trace_buffer_control_regs+-C cluster0.has_trbe=$supports_trace_buffer_control_regs}
+${supports_branch_record_buffer_control_regs+-C cluster0.has_brbe=$supports_branch_record_buffer_control_regs}
 
 EOF