Only enable COUNTIO in full builds

Author: tannewt

py/circuitpy_mpconfig.mk

@@ -88,7 +88,7 @@ CFLAGS += -DCIRCUITPY_BUSIO=$(CIRCUITPY_BUSIO)
 CIRCUITPY_DIGITALIO ?= 1
 CFLAGS += -DCIRCUITPY_DIGITALIO=$(CIRCUITPY_DIGITALIO)
 
-CIRCUITPY_COUNTIO ?= 1
+CIRCUITPY_COUNTIO ?= $(CIRCUITPY_FULL_BUILD)
 CFLAGS += -DCIRCUITPY_COUNTIO=$(CIRCUITPY_COUNTIO)
 
 CIRCUITPY_DISPLAYIO ?= $(CIRCUITPY_FULL_BUILD)