Use original ESP8266-specific speeds for SPI speeds (#6023)

earlephilhower · web-flow · commit feb3988b93bf · 2019-04-29T12:39:26.000-07:00
Replace the default SPI_FULL/HALF/QUARTER_SPEEDs with ESP8266 appropriate ones taken from the original SD library that @igrr modified. Fixes #6019
diff --git a/libraries/ESP8266SdFat b/libraries/ESP8266SdFat
@@ -1 +1 @@
-Subproject commit 92ab4b59eb920bf3134347dbe07e7c059eb64d46
+Subproject commit f0962921955e2503243f28de0fdc9ac188177ffb
