drivers/pcie: Move PCIE code to relevant place

Though it was noted that pcie_get_cap() is only used by MSI code so far,
there is no need to put it in msi code. If unused, linker will nuke it.
So let's move things to where it belongs to.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
4 files changed