Update to SDFat upstream 2.2.2 (esp8266#9126)

* Update to SDFat upstream 2.2.2

Pull in reformatted/slightly refactored SDFat 2.2.2 upstream.

Very minor changes, simple testing on other architectures passed w/o
incident.

* Fix SdFat to build for ESP8266

2.2.2 removed a define from the configuration header which is needed to
compile on the ESP8266.  Restore the default values there previously.

* SDFat Debug tests not compatible, skip

---------

Co-authored-by: Max Prokhorov <[email protected]>

Author: earlephilhower

Diff for: libraries/ESP8266SdFat

@@ -46,7 +46,8 @@ function skip_ino()
     *"/TeensySdioLogger/"* | \
     *"/UserChipSelectFunction/"* | \
     *"/UserSPIDriver/"* | \
-    *"/onewiretest/"*)
+    *"/onewiretest/"* | \
+    *"/debug/"*)
         return 0
         ;;
     *"Teensy"*)