Many files in the tree implement functions, but do not include the
header files which provide the prototypes for these functions. This
means conflicting prototypes remain undetected. Add the missing
includes.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

lsee takes a loff_t pos argument and not a off_t argument. Fix.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This commit create a common directory, lib/,
for arm and arm64 common code.

It also create lib32/ and lib64/ for 32bit
and 64bit code respectively.

Signed-off-by: Raphael Poggi <poggi.raph@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>