Merge branch 'bugfix/xtal_freq_40' into 'master'

esp32: by default, set 40MHz crystal frequency



See merge request !1140

components/esp32/Kconfig

@@ -562,7 +562,7 @@ config ESP32_DEEP_SLEEP_WAKEUP_DELAY
 
 choice ESP32_XTAL_FREQ_SEL
     prompt "Main XTAL frequency"
-    default ESP32_XTAL_FREQ_AUTO
+    default ESP32_XTAL_FREQ_40
     help
         ESP32 currently supports the following XTAL frequencies: