ci(fvp): add fvp build configs to tf-l1-build-fvp group

A few FVP build configurations mentioned in the coverity script are not
included in tf-l1-build-fvp. This patch adds the missing FVP build
configurations to tf-l1-build-fvp.

Signed-off-by: Elizabeth Ho <elizabeth.ho@arm.com>
Change-Id: I21a3760905f81adca34fe60f490a45e478036550
diff --git a/tf_config/fvp-mpam b/tf_config/fvp-mpam
new file mode 100644
index 0000000..87b7553
--- /dev/null
+++ b/tf_config/fvp-mpam
@@ -0,0 +1,3 @@
+CROSS_COMPILE=aarch64-none-elf-
+ENABLE_MPAM_FOR_LOWER_ELS=1
+PLAT=fvp