MFC r362384,r362385,r362386,r362392:
r362384: Add DTB files for ARMADA 8040 based boards. r362385: Add specialized gpio driver for ARMADA 8k SoC. Older marvell gpio blocks are to different for reusing/enhancing existing frivers. r362386: Add specific stub for ARMADA 8k SoC to Marvell RTC driver. The AXI bridge is different between ARMADA 38x and 8K, and both platforms needs specific setup to mitigate HW issues with accessing RTC registers. r362392: Adapt ARMADA8k PCIe driver to newly imported 5.7 DT. - temporarily disable handling with phy, we don't have driver for it yet - always clear cause for administartive interrupt. While I'm in, fix style(9) (mainly whitespace).