kselftest: Move ksft helper module to common directory

Move the ksft python module, which provides generic helpers for
kselftests, to a common directory so it can be more easily shared
between different tests.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20240705-dev-err-log-selftest-v2-2-163b9cd7b3c1@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: nfraprado

tools/testing/selftests/Makefile

@@ -251,6 +251,7 @@ ifdef INSTALL_PATH
 	install -m 744 kselftest/runner.sh $(INSTALL_PATH)/kselftest/
 	install -m 744 kselftest/prefix.pl $(INSTALL_PATH)/kselftest/
 	install -m 744 kselftest/ktap_helpers.sh $(INSTALL_PATH)/kselftest/
+	install -m 744 kselftest/ksft.py $(INSTALL_PATH)/kselftest/
 	install -m 744 run_kselftest.sh $(INSTALL_PATH)/
 	rm -f $(TEST_LIST)
 	@ret=1;	\

tools/testing/selftests/devices/probe/Makefile

@@ -1,4 +1,4 @@
 TEST_PROGS := test_discoverable_devices.py
-TEST_FILES := boards ksft.py
+TEST_FILES := boards
 
 include ../../lib.mk

tools/testing/selftests/devices/probe/test_discoverable_devices.py

@@ -16,12 +16,17 @@
 
 import argparse
 import glob
-import ksft
 import os
 import re
 import sys
 import yaml
 
+# Allow ksft module to be imported from different directory
+this_dir = os.path.dirname(os.path.realpath(__file__))
+sys.path.append(os.path.join(this_dir, "../../kselftest/"))
+
+import ksft
+
 pci_controllers = []
 usb_controllers = []