feat(ast2700): add Aspeed AST2700 build config

Add the platform build config for AST2700 SoC.

Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Change-Id: Id2b5310104307cc048e240582196c4b078968d93
diff --git a/script/tf-coverity/tf-cov-make b/script/tf-coverity/tf-cov-make
index ff4ad5e..923305a 100755
--- a/script/tf-coverity/tf-cov-make
+++ b/script/tf-coverity/tf-cov-make
@@ -710,4 +710,7 @@
 # QTI MSM8916 platform
 clean_build PLAT=msm8916 $(common_flags)
 
+# Platforms from Aspeed
+clean_build PLAT=ast2700 $(common_flags) SPD=opteed
+
 cd ..