Use ROMLIB when CoT descriptors are in device tree

Use ROMLIB when CoT descriptors are in device tree
to avoid the build failure due to the BL2 size exceed
its maximum limit.

Change-Id: I3b8e377015cb9339a8ffdb3149dd764ee67e4871
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/script/tf-coverity/tf-cov-make b/script/tf-coverity/tf-cov-make
index fa3a68e..44078a2 100755
--- a/script/tf-coverity/tf-cov-make
+++ b/script/tf-coverity/tf-cov-make
@@ -201,7 +201,7 @@
 clean_build $fvp_common_flags ${ARM_TBB_OPTIONS} MEASURED_BOOT=1
 
 # CoT descriptors in device tree
-clean_build $fvp_common_flags ${ARM_TBB_OPTIONS} COT_DESC_IN_DTB=1
+clean_build $fvp_common_flags ${ARM_TBB_OPTIONS} COT_DESC_IN_DTB=1 USE_ROMLIB=1
 
 #
 # Juno platform