Changelog FreeRTOS kernel for MCUXpresso SDK

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[11.1.0_rev0]

Apply CM33 security fix from 10.4.3-LTS-Patch-2. See rtos\freertos\freertos_kernel\History.txt
Apply CM33 security fix from 10.4.3-LTS-Patch-1. See rtos\freertos\freertos_kernel\History.txt

New features:
- Tickless idle mode support for Cortex-A7. Add fsl_tickless_epit.c and fsl_tickless_generic.h in portable/IAR/ARM_CA9 folder.
- Enabled float context saving in IAR for Cortex-A7. Added configUSE_TASK_FPU_SUPPORT macros. Modified port.c and portmacro.h in portable/IAR/ARM_CA9 folder.
Other changes:
- Transformed ARM_CM core specific tickless low power support into generic form under freertos/Source/portable/low_power_tickless/.

New features:
- Enabled MCUXpresso thread aware debugging. Add freertos_tasks_c_additions.h and configINCLUDE_FREERTOS_TASK_C_ADDITIONS_H and configFRTOS_MEMORY_SCHEME macros.

New features:
- Enabled -flto optimization in GCC by adding attribute((used)) for vTaskSwitchContext.
- Enabled KDS Task Aware Debugger. Apply FreeRTOS patch to enable configRECORD_STACK_HIGH_ADDRESS macro. Modified files are task.c and FreeRTOS.h.

New features:
- Example freertos_sem_static.
- Static allocation support RTOS driver wrappers.
Other changes:
- Tickless idle rework. Support for different timers is in separated files (fsl_tickless_systick.c, fsl_tickless_lptmr.c).
- Removed configuration option configSYSTICK_USE_LOW_POWER_TIMER. Low power timer is now selected by linking of apropriate file fsl_tickless_lptmr.c.
- Removed configOVERRIDE_DEFAULT_TICK_CONFIGURATION in RVDS port. Use of attribute((weak)) is the preferred solution. Not same as _weak!

New features:
- Tickless idle mode support.
- Added template application for Kinetis Expert (KEx) tool (template_application).
Other changes:
- Folder structure reduction. Keep only Kinetis related parts.