v1.21.1
[mii] Add bit-bashing interface
[iscsi] Fix iBFT when no explicit initiator name setting exists
[efi] Avoid dragging in USB subsystem via efi_usb_path()
[golan] Add new PCI IDs
[linux] Impose receive quota on tap driver
[sfc] Update email addresses
[legal] Relicense files under GPL2_OR_LATER_OR_UBDL
[xhci] Update driver to use DMA API