feat: introduce UNDEF injection test scripts

Test to verify UNDEF injection support in TF-A by trapping FGT register
access from tftf into EL3. To emulate this we run the FVP with FEAT_FGT
present but do not set ENABLE_FEAT_FGT which allows lower EL access to
FGT registers (not setting SCR_EL3.FGTEN).

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: I2d5a4990ca20a4522edf3d56dc920eb354d4ffe9
diff --git a/tf_config/fvp-undef-injection b/tf_config/fvp-undef-injection
new file mode 100644
index 0000000..5d508d9
--- /dev/null
+++ b/tf_config/fvp-undef-injection
@@ -0,0 +1,4 @@
+CROSS_COMPILE=aarch64-none-elf-
+CTX_INCLUDE_AARCH32_REGS=0
+PLAT=fvp
+ENABLE_FEAT_FGT=0