ESP: Change default flash frequency to 80 MHz

Should work for most of the users, the rest can go back to 40 by adding `--esp-flash-params=,,40m`

CL: ESP: Change default flash frequency to 80 MHz

PUBLISHED_FROM=39c7ab3e173956491cf79fb5d3f4936a21f5a1d9

mos/flash/esp/flasher/common.go

@@ -11,7 +11,7 @@ import (
 
 const (
 	defaultFlashMode = "dio"
-	defaultFlashFreq = "40m"
+	defaultFlashFreq = "80m"
 )
 
 type cfResult struct {