Removed any dependency from ppsi's internal copy of spec drivers, and the
drivers' source itself.

With this patch, now we ppsi is fully compatible with wrpc-sw drivers.

In order to compile ppsi main (which, in the future, will become obsolete)
you can now either:
- copy ppsi project inside the wrpc-sw dir (or, better, use the ppsi as
wrpc-sw submodule)
- go into arch-spec/Makefile and modify the WRPCSW_ROOT var
Signed-off-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

Signed-off-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

Signed-off-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

Signed-off-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

Signed-off-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

Signed-off-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

Relevant commits from other repositories:
wrpc-sw 	8bca95be (tag wrpc-2.0)
ptp-noposix 	b426591a (no tag, but is a submodule)
wr-cores	6a20635e (tag wrpc-2.0)

For information about how to compile the wr-cores:
http://www.ohwr.org/attachments/1512/wrpc.pdf

See commit beeb408a in wrpc-sw

This commit does not introduce any significant modification, but only
reports in proto-standard some minor modifications done in proto-ext-whiterabbit

Revert "spec architecture set as default (easier for SPEC development)"
This reverts commit 6f5ed695.

Revert "FULL_DIAG set as default"
This reverts commit e8fba2d4.

standard protocol (with no extension) set back as default compilation

since ep_get_deltas function, implemented in arch-spec/dev/endpoint.c,
uses 32bit deltas, 32bit parameters when calling it too. Without
this patch, I experienced a bug in delta values

This patch implements a feature of white rabbit protocol, see pag.65
of wrspec.v2-06-07-2011