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-gpt-romlib-fwu b/tf_config/fvp-gpt-romlib-fwu
new file mode 100644
index 0000000..d784c5a
--- /dev/null
+++ b/tf_config/fvp-gpt-romlib-fwu
@@ -0,0 +1,8 @@
+ARM_GPT_SUPPORT=1
+ARM_ROTPK_LOCATION=devel_rsa
+CROSS_COMPILE=aarch64-none-elf-
+FVP_TRUSTED_SRAM_SIZE=384
+PLAT=fvp
+PSA_FWU_SUPPORT=1
+USE_ROMLIB=1
+TRUSTED_BOARD_BOOT=1