Import from meta mentor

These are the patches from meta-mentor that belong in meta-tracing.

The patches and bbappend files are brought over verbatim from meta-mentor master lttng-2.0 directory:

linux-imx
linux-qoriq-sdk
linux-omap4
lttng-modules

Note: the patches in linux-omap4 still apply to version 3.1.0, however upstream meta-ti has moved on to 3.4 for the pandaboard, so these patches will need to be reworked to reflect that.