iMX6_DFP

      Updated Example:
      - Terminating app_main thread with osThreadExit() to avoid endless loop
      - Updated debug launch configuration files.
      - Updated Linux_Application_TTY example to use latest Linaro GCC toolchain.
      - Corrected Inner Cacheability attributes for Translation Table TTBR0 in MMU config.

      Fixed device description of basic features.
      Added QSPI flash algorithms.
      Removed requirement for CMSIS-FreeRTOS pack.

      Added CMSIS-RTOS2 RTX5 and FreeRTOS examples for Cortex-A9 processor.

      Added support for i.MX 6SLL devices.
      Added ARM Compiler 6 support and examples.
      Updated RPMSG examples.
      Updated debug description for i.MX 6SoloX:
      - Removed unnecessary DebugPortSetup sequence
      - Split DebugPortStart sequence into Cortex-A9 and Cortex-M4 specific sequences
      - Restore previous Cortex-A9 debug/system power state after release of Cortex-M4 from reset

      Added pack requirements.
      Delisted FreeRTOS example as it requires unreleased CMSIS pack version.

      Added Startup and System files for Cortex-A9.
      Added FreeRTOS Blinky example for Cortex-A9.
      Added board support for the iMX6-SoloX-COM Board.

      Added support for i.MX 6ULL devices.
      Added devices into i.MX 6SoloX and i.MX 6UltraLite sub-families.

      Updated device header files' #pragma push/pop statements to support ARMClang 6.
      Updated SDF file for iMX6SX to block reset capability.

      Added device support for i.MX 6 UltraLite.
      Added QSPI flash algorithms.
      Updated SVD file iMX6SX_A9.svd to prevent SVDConv error

      Initial device support for i.MX 6 SoloX.