[coreboot] X201 status

[Vladimir 'φ-coder/phcoder' Serbinenko]

Current status.
Raminit: works with delays/printfs currently in place, 1-ranked memory
populating one slot. Didn't test in any other config yet (either
removing debug and delays or trying other type of memory). Looks like
resulting settings are slower than original BIOS due to me skipping some
of advanced training.
EHCI and AHCI work in GRUB shell.
VGA option ROM works
keyboard works.
LAN card doesn't show up in lspci
ACPI tables are visible in GRUB but mysteriously disappear when Linux is
booted (working theory is that some other device got mapped over).
Linux boots into debian netinst (images taken from USB stick).