dumpstate: Collect PCIe link statistics

Collect PCIe link statistics in dump_pcie.sh script.
Move SELinux type declaration 'sysfs_pcie' here.

Test: adb bugreport && unzip bugreport*.zip &&
      grep link_stats dumpstate_board.txt
Bug: 266561593
Change-Id: Iecf3a5a20892efb6d9cc9f4a5c322aafa76f8e7f
Signed-off-by: Doug Zobel <zobel@google.com>
3 files changed