OpenSBI v1.9 Released

Hi All,

The OpenSBI v1.9 is now available on GitHub at:
https://github.com/riscv-software-src/opensbi/releases

This release has the following changes.

General:
* Initialize stack guard using Zkr extension
* Improved irqchip framework to handle wired interrupts and MSIs
* Added unit test for string operations
* Added NMI support using Smrnmi extension
* Added timer events support
* Added Vector context save/restore in domain switch
* Added Floating-point context save/restore in domain switch
* Added Common PMP encoding/decoding helper functions
* Added UBSan support
* Improved misaligned vector load/store emulation

Platforms:
* Added SiFive development platform support
* Removed kendryte/k210 platform
* Added Tenstorrent Atlantis platform support

Drivers:
* Added Andes last level cache controller driver
* Added Andes ATCSMU suspend driver
* Added Altera JTAG UART driver
* Added MPXY client driver for RPMI MM service group
* Added minimal SpacemiT I2C driver
* Added SpacemiT P1 PMIC reset driver
* Added Litex SoC reset driver

Many thanks to everyone who has contributed to this release.

Best Regards,
Anup Patel

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