modules: mbedtls: fix PSA Kconfig file generation on Windows

When running in a Windows environment, convert the slash direction to
match that used in config.psa and config-psa.h to eliminate the issue.

Signed-off-by: Tiffany Hsieh <thsieh@atmosic.com>

Author: thsieh97

modules/mbedtls/create_psa_files.py

@@ -1,6 +1,7 @@
 #!/bin/python3
 
 # Copyright (c) 2024 Nordic Semiconductor ASA
+# Copyright (c) Atmosic 2025
 # SPDX-License-Identifier: Apache-2.0
 
 import re
@@ -17,6 +18,9 @@
 KCONFIG_PATH=os.path.join(SCRIPT_PATH, "Kconfig.psa.auto")
 HEADER_PATH=os.path.join(SCRIPT_PATH, "configs", "config-psa.h")
 
+if sys.platform == "win32":
+    INPUT_REL_PATH = INPUT_REL_PATH.replace("\\", "/")
+
 KCONFIG_HEADER="""\
 # Copyright (c) 2024 Nordic Semiconductor ASA
 # SPDX-License-Identifier: Apache-2.0