selftests: intel_pstate: build only on x86

These tests are only for x86, so don't try to build or run
them on other architectures.
Signed-off-by: NDaniel Díaz <daniel.diaz@linaro.org>
Signed-off-by: NShuah Khan <shuahkh@osg.samsung.com>

tools/testing/selftests/intel_pstate/Makefile

 CFLAGS := $(CFLAGS) -Wall -D_GNU_SOURCE
 LDLIBS := $(LDLIBS) -lm
 
+ifeq (,$(filter $(ARCH),x86))
 TEST_GEN_FILES := msr aperf
+endif
 
 TEST_PROGS := run.sh
 

tools/testing/selftests/intel_pstate/run.sh

@@ -29,6 +29,11 @@
 
 EVALUATE_ONLY=0
 
+if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then
+	echo "$0 # Skipped: Test can only run on x86 architectures."
+	exit 0
+fi
+
 max_cpus=$(($(nproc)-1))
 
 # compile programs