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>
diff --git a/pcie/dump_pcie.sh b/pcie/dump_pcie.sh
index 0d543d6..4546207 100644
--- a/pcie/dump_pcie.sh
+++ b/pcie/dump_pcie.sh
@@ -3,3 +3,9 @@
 cat /dev/logbuffer_pcie0
 echo "--- pcie1 dump ---"
 cat /dev/logbuffer_pcie1
+
+echo "--- pcie link statistics ---"
+for f in /sys/devices/platform/*.pcie/link_stats/*
+do
+  echo "$f: `cat $f`"
+done