fvp: add test group with 48-bit PA size

TFTF platform supports configurable PA size, in particular with tests
in the 48bit address range.
Adding a new test group and configurations to compile TFTF with 48bit
PA size and configure the model accordingly.

Signed-off-by: Federico Recanati <federico.recanati@arm.com>
Change-Id: Ic6499ae1903e3353831679c3b5c4bd2926032a9f
diff --git a/tftf_config/fvp-48bit-pa b/tftf_config/fvp-48bit-pa
new file mode 100644
index 0000000..2a04d05
--- /dev/null
+++ b/tftf_config/fvp-48bit-pa
@@ -0,0 +1,4 @@
+CROSS_COMPILE=aarch64-none-elf-
+PLAT=fvp
+PA_SIZE=48
+TESTS=spm