eclair: Switch to use existing TF config encodings

To reuse existing infrastructure and provide clear migration path from
existing Coverity tests.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I8dae6b8b568f3b9967dc88239caf346ed8698d6a
diff --git a/eclair/build-tfa.sh b/eclair/build-tfa.sh
index 7954f6e..58b514f 100755
--- a/eclair/build-tfa.sh
+++ b/eclair/build-tfa.sh
@@ -7,7 +7,8 @@
 
 set -ex
 
-export CROSS_COMPILE=/opt/gcc-arm-11.2-2022.02-x86_64-aarch64-none-elf/bin/aarch64-none-elf-
+env
+
 cd ${WORKSPACE}/trusted-firmware-a
-make PLAT=$1 clean
-make PLAT=$1 ${MAKE_TARGET} -j3
+make clean
+make ${MAKE_TARGET} -j3