interconnect: Move internal structs into a separate file

Move the interconnect framework internal structs into a separate file,
so that it can be included and used by ftrace code. This will allow us
to expose some more useful information in the traces.

Change-Id: I97720025fcff087e19ddf6eb1f092fd42b5b78b2
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Git-commit: dd018a9cf9108f9c7d924f6fe09aed745e78a67e
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Georgi Djakov <gdjako@codeaurora.org>