Update lttng-ust to version 2.2.1 to correspond to the LTTng 2.2
"Cuda" - Tracer toolchain stable release.
This also removes all the local lttng-ust patches, which are now
upstream.
(From OE-Core rev: 3f856556972617560b24cc86bfab027bed83bd49)
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>