esp32/Makefile: Change default FLASH_MODE to dio for WROOM-32 module.

MrSurly · dpgeorge · commit 7132bcdc353e · 2017-04-13T10:30:23.000+10:00
ESP-WROOM-32 (and therefore ESP-WROVER-KIT) is the reference module for
development, and the most common one out there, so makes sense to provide
default settings for it.
diff --git a/esp32/Makefile b/esp32/Makefile
@@ -16,7 +16,7 @@ include ../py/py.mk
 
 PORT ?= /dev/ttyUSB0
 BAUD ?= 460800
-FLASH_MODE ?= qio
+FLASH_MODE ?= dio
 FLASH_FREQ ?= 40m
 FLASH_SIZE ?= 4MB
 CROSS_COMPILE ?= xtensa-esp32-elf-
