lzma: Update LZMA SDK code from 9.20 to 25.01

Currently, we have a copy of the LZMA SDK code, version 9.20, with small
updates. The original import of the LZMA SDK included a script to update the
library. This is no longer possible, due to important local changes, so
remove it. We also remove a number of extra text files that should be
unchanged from upstream, but provide no direct value to the project.
Instead, have the help text for LZMA note that this comes from the LZMA
SDK.

Next, we move our code up to the current release, 25.01. There are a
number of new header files, and some performance improvements made to
the code, at the cost of between 2 to 3 kilobytes in binary size. As
there is now a Kconfig option to disable this and retain similar speed
to what we have currently, the default option is to make this trade-off.
Our changes to the code around calling schedule() to avoid the watchdog
being triggered are kept. We add __UBOOT__ guards in two places to
prevent conflict with our own usage of these words on MIPS.

Signed-off-by: Tom Rini <trini@konsulko.com>

include/lzma/LzmaTypes.h

@@ -14,6 +14,6 @@
  */
 #define Byte LZByte
 
-#include "../../lib/lzma/Types.h"
+#include "../../lib/lzma/7zTypes.h"
 
 #endif