This MR aims to add support for the PolarFire SoC icicle Kit.
All of the work is in the elements/boards/icicle-kit directory. The devkit doesn't have an onboard GPU, and the only supported card is a ATI HD6450, the firmware for which gets baked into the kernel so we're able to see the console as early as possible in the boot process.
As things stand, GDM doesn't start properly with hardware acceleration enabled. As such, the image is constructed in such a way that GDM is made to use the softpipe driver.