selftests: amd-pstate: fix TEST_FILES

Bring back the Python scripts that were initially added with
TEST_GEN_FILES but now with TEST_FILES to avoid having them deleted
when doing a clean.  Also fix the way the architecture is being
determined as they should also be installed when ARCH=x86_64 is
provided explicitly.  Then also append extra files to TEST_FILES and
TEST_PROGS with += so they don't get discarded.

Fixes: ba2d788a ("selftests: amd-pstate: Trigger tbench benchmark and test cpus")
Fixes: a49fb721 ("selftests: amd-pstate: Don't delete source files via Makefile")
Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/amd-pstate/Makefile

@@ -4,10 +4,15 @@
 # No binaries, but make sure arg-less "make" doesn't trigger "run_tests"
 all:
 
-uname_M := $(shell uname -m 2>/dev/null || echo not)
-ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
+ARCH ?= $(shell uname -m 2>/dev/null || echo not)
+ARCH := $(shell echo $(ARCH) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
 
-TEST_PROGS := run.sh
-TEST_FILES := basic.sh tbench.sh gitsource.sh
+ifeq (x86,$(ARCH))
+TEST_FILES += ../../../power/x86/amd_pstate_tracer/amd_pstate_trace.py
+TEST_FILES += ../../../power/x86/intel_pstate_tracer/intel_pstate_tracer.py
+endif
+
+TEST_PROGS += run.sh
+TEST_FILES += basic.sh tbench.sh gitsource.sh
 
 include ../lib.mk