This patch updates zlib to the latest stable version.
Only relevant zlib parts were ported to u-boot tree, as already did for the
current zlib (0.95). New zlib guarantees a faster inflate performances
other then others improvements as explained at www.zlib.net.
It also includes Alessandro Rubini's patches to allow 0 as destination pointer
and to call watchdog reset if required by architecture.

Signed-off-by: Giuseppe Condorelli <giuseppe.condorelli@st.com>
Reviewed-by: Angelo Castello <angelo.castello@st.com>
Reviewed-by: Alessandro Rubini <rubini-list@gnudd.com>

This reverts commit b201171f2b4d509f3ad510b214bee70ff902e3d6.

The commit caused problems for example when unpacking kernel images:

	   Uncompressing Kernel Image ... Error: inflate() returned -2
	   GUNZIP: uncompress, out-of-mem or overwrite error - must
	   RESET board to recover

Conflicts:

	include/u-boot/zlib.h
	lib_generic/zlib.c

Signed-off-by: Wolfgang Denk <wd@denx.de>

Signed-off-by: Wolfgang Denk <wd@denx.de>

This patch updates zlib to the latest stable version.

Only relevant zlib parts were ported to u-boot tree, as was done for
the previously used version of zlib (0.95). New zlib gives faster
inflate performance and other improvements, see www.zlib.net

Signed-off-by: Giuseppe Condorelli <giuseppe.condorelli@st.com>
Reviewed-by: Angelo Castello <angelo.castello@st.com>

Edited commit message

Signed-off-by: Wolfgang Denk <wd@denx.de>

Some systems have zlib.h installed in /usr/include/. This isn't the
desired file for u-boot code - we want the one in include/zlib.h.
This rename will avoid the conflict.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>