upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support

wdenk 028ab6b598 * Patch by Peter Ryser, 20 Feb 2004: ... Add support for the Xilinx ML300 platform * Patch by Stephan Linz, 17 Feb 2004: Fix watchdog support for NIOS * Patch by Josh Fryman, 16 Feb 2004: Fix byte-swapping for cfi_flash.c for different bus widths * Patch by Jon Diekema, 14 Jeb 2004: Remove duplicate "FPGA Support" notes from the README file		21 years ago
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common	* Patch by Peter Ryser, 20 Feb 2004:	21 years ago
ml300	* Patch by Peter Ryser, 20 Feb 2004:	21 years ago
xilinx_enet	* Patch by Peter Ryser, 20 Feb 2004:	21 years ago