lttng-modules: fix build with 5.4.229 kernel

lttng-modules: fix build with 5.4.229 kernel

Fixes:

In file included from TOPDIR/tmp/work/qemuarm-poky-linux-gnueabi/lttng-modules/2.11.6-r0/lttng-modules-2.11.6/probes/../probes/define_trace.h:87,
                 from TOPDIR/tmp/work/qemuarm-poky-linux-gnueabi/lttng-modules/2.11.6-r0/lttng-modules-2.11.6/probes/../instrumentation/events/lttng-module/jbd2.h:183,
                 from TOPDIR/tmp/work/qemuarm-poky-linux-gnueabi/lttng-modules/2.11.6-r0/lttng-modules-2.11.6/probes/lttng-probe-jbd2.c:29:
TOPDIR/tmp/work/qemuarm-poky-linux-gnueabi/lttng-modules/2.11.6-r0/lttng-modules-2.11.6/probes/../probes/lttng-tracepoint-event-impl.h:130:6: error: conflicting types for 'trace_jbd2_run_stats'
  130 | void trace_##_name(_proto);
      |      ^~~~~~
TOPDIR/tmp/work/qemuarm-poky-linux-gnueabi/lttng-modules/2.11.6-r0/lttng-modules-2.11.6/probes/../probes/lttng-tracepoint-event-impl.h:42:2: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP'
   42 |  LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args))
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TOPDIR/tmp/work/qemuarm-poky-linux-gnueabi/lttng-modules/2.11.6-r0/lttng-modules-2.11.6/probes/../probes/lttng-tracepoint-event-impl.h:84:2: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_MAP'
   84 |  LTTNG_TRACEPOINT_EVENT_MAP(name, name,    \
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~
TOPDIR/tmp/work/qemuarm-poky-linux-gnueabi/lttng-modules/2.11.6-r0/lttng-modules-2.11.6/probes/../instrumentation/events/lttng-module/jbd2.h:107:1: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT'
  107 | LTTNG_TRACEPOINT_EVENT(jbd2_run_stats,
      | ^~~~~~~~~~~~~~~~~~~~~~
In file included from TOPDIR/tmp/work-shared/qemuarm/kernel-source/include/trace/events/jbd2.h:9,
                 from TOPDIR/tmp/work/qemuarm-poky-linux-gnueabi/lttng-modules/2.11.6-r0/lttng-modules-2.11.6/probes/lttng-probe-jbd2.c:18:
TOPDIR/tmp/work-shared/qemuarm/kernel-source/include/linux/tracepoint.h:243:21: note: previous definition of 'trace_jbd2_run_stats' was here
  243 |  static inline void trace_##name(proto)    \
      |                     ^~~~~~
TOPDIR/tmp/work-shared/qemuarm/kernel-source/include/linux/tracepoint.h:406:2: note: in expansion of macro '__DECLARE_TRACE'
  406 |  __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),  \
      |  ^~~~~~~~~~~~~~~
TOPDIR/tmp/work-shared/qemuarm/kernel-source/include/linux/tracepoint.h:542:2: note: in expansion of macro 'DECLARE_TRACE'
  542 |  DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
      |  ^~~~~~~~~~~~~
TOPDIR/tmp/work-shared/qemuarm/kernel-source/include/trace/events/jbd2.h:234:1: note: in expansion of macro 'TRACE_EVENT'
  234 | TRACE_EVENT(jbd2_run_stats,
      | ^~~~~~~~~~~
  CC [M]  TOPDIR/tmp/work/qemuarm-poky-linux-gnueabi/lttng-modules/2.11.6-r0/lttng-modules-2.11.6/probes/lttng-probe-ext4.o

Backport from upstream master branch fixes:

https://github.com/lttng/lttng-modules/commit/b28830a0dcdf95ec3e6b390b4d032667deaad0c0
https://github.com/lttng/lttng-modules/commit/4fd2615b87b3cac0fd5bdc5fc82db05f6fcfdecf
https://github.com/lttng/lttng-modules/commit/612c99eb24bf72f4d47d02025e92de8c35ece14e

Note that master branch upstream has restructured the location of header files, so the patches
do not apply cleanly.  This patch combines the changes in the above commits in the old header location.

Signed-off-by: Steve Sakoman <steve@sakoman.com>