d4f0c5d088
IBM BIOSes ignore the PnP header offset stored at address 0x1a and instead scan for the $PnP signature on a 16-byte boundary. (This alignment is not mandated by the PnP specification.) Force PnP header to a 16-byte boundary to work around these BIOSes. Signed-off-by: Michael Brown <mcb30@ipxe.org>