Avoid RES0 bits of register in test.

Change-Id: I7cbea135df5ad304865767af7ceaa39a275b9b1a
diff --git a/test/vmapi/primary_with_secondaries/debug_el1.c b/test/vmapi/primary_with_secondaries/debug_el1.c
index a6d07a3..381c2c6 100644
--- a/test/vmapi/primary_with_secondaries/debug_el1.c
+++ b/test/vmapi/primary_with_secondaries/debug_el1.c
@@ -92,5 +92,5 @@
 	EXPECT_EQ(hf_vm_get_id(), HF_PRIMARY_VM_ID);
 
 	CHECK_UPDATE(DBGBCR0_EL1, 0x0, 0x2);
-	CHECK_UPDATE(DBGBVR0_EL1, 0x7, 0xf0);
+	CHECK_UPDATE(DBGBVR0_EL1, 0xc4, 0xf0);
 }