Remove macros which aren't used anywhere in the driver, and which
conflict with macros of the same name used in the EFI headers.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

Driver for Intel 82576 based virtual functions, based on Intel source
code available at:

    http://sourceforge.net/projects/e1000  (igbvf-1.0.7)

Based on initial port from Eric Keller <ekeller@princeton.edu>.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

This commit adds an igb (Intel GigaBit) driver based on Intel source
code available at:

    http://sourceforge.net/projects/e1000/

which is upstream source for the Linux kernel e1000 drivers, and
should support some PCIe e1000 variants.

Signed-off-by: Marty Connor <mdc@etherboot.org>

This commit replaces the current gPXE e1000 driver with one ported
from Intel source code available at

    http://sourceforge.net/projects/e1000/

which is upstream source for the Linux kernel e1000 drivers, and
should support most if not all PCI e1000 variants.

Signed-off-by: Marty Connor <mdc@etherboot.org>

Add FILE_LICENCE declarations to almost all files that make up the
various standard builds of gPXE.

Signed-off-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>