pciutils: Fold patches into a single patch with a description

pciutils: Fold patches into a single patch with a description

Patches patching content from other patches is bad. This folds the three
patches into one, improves some of what its doing to be a little
cleaner and adds a proper description to the patch header.

This also moves the STRIP override to the configure commandline rather
than patching and handles passing libdir the same way.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>