Disable libitm as it is not supported on MicroBlaze.
(From OE-Core rev: 18f127765f1cdcf531f29c58641a256c199d888c)
Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>