Darian Leung 1c60d6a895 freertos: Add SPDX license identifiers and update xtensa port files
This commit does the following:

- Adds SPDX license identifiers to FreeRTOS sources. Remove those FreeRTOS sources from
  the copyright ignore list.
- Update xtensa port files to match FreeRTOS v10.4.3. Added SPDX license identifiers
  to the port files.
- Fixed some improperly licensed files
- Removed portbenchmark.h from RISC-V port
2022-02-03 17:08:14 +08:00
..
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2021-02-26 19:45:48 +08:00