PewPew M4: use keypad instead of gamepad

Since the new keypad module is taking over gamepad functionality,
I'm switching to it. If this works well, I will make the change
for the remaining boards.

Author: deshipu

frozen/circuitpython-stage

@@ -30,14 +30,17 @@ CIRCUIPTY_USB_CDC = 0
 CIRCUITPY_USB_HID = 0
 CIRCUITPY_USB_MIDI = 0
 CIRCUITPY_VECTORIO = 0
+CIRCUITPY_GAMEPAD = 0
+CIRCUITPY_PWMIO = 0
 
 CIRCUITPY_ANALOGIO = 1
 CIRCUITPY_AUDIOMIXER = 1
 CIRCUITPY_AUDIOIO = 1
+CIRCUITPY_SYNTHIO = 1
 CIRCUITPY_DISPLAYIO = 1
-CIRCUITPY_GAMEPAD = 1
 CIRCUITPY_MATH = 1
 CIRCUITPY_STAGE = 1
+CIRCUITPY_KEYPAD = 1
 
 FROZEN_MPY_DIRS += $(TOP)/frozen/circuitpython-stage/pewpew_m4
 CIRCUITPY_DISPLAY_FONT = $(TOP)/ports/atmel-samd/boards/ugame10/brutalist-6.bdf