This header is present only on Linux, so get rid of it. The problem
is that we can no longer use __cpu_to_be16() function, which is Linux
specific. This function can be replaced in a slightly hackish way by
using the htons() call, as they do the same thing -- convert uint16_t
from the host endianness to the network endianness (which is BE). The
same goes the other way around, from __be16_to_cpu() is replaced by
ntohs(), which is again a slight hack.

Signed-off-by: Marek Vasut <marex@denx.de>