* Merge in remaining trusty SRU changes: * Add U-Boot environment configuration support (LP: #1328597) * HP Moonshot Cartridges: Use $baudrate from u-boot environment as serial console speed (LP: #1373628) * HP Moonshot Cartridges: Enable hardware flow control as required by the HP moonshot chassis (LP: #1328280) * Enable U-Boot environment support for X-Gene platforms * Use filesystem agnostic "load" command instead of assuming ext4 * Add support for HP ProLiant m800 cartridges (LP: #1326437) * Set required boot arguments for HP ProLiant m800 cartridges (LP: #1373659)