Added HW NEOPIXEL Definition

Added definition for the built-in Neopixel.  This is useful for CircuitPython Statas: https://learn.adafruit.com/welcome-to-circuitpython/troubleshooting#circuitpython-rgb-status-light-18-10

Author: bwshockley

ports/atmel-samd/boards/mini_sam_m0/mpconfigboard.h

@@ -1,9 +1,12 @@
-// LEDs
-//#define MICROPY_HW_LED_MSC              PIN_PA15 // red
-
+// Board Name / MCU Type
 #define MICROPY_HW_BOARD_NAME "Mini Sam M0"
 #define MICROPY_HW_MCU_NAME "samd21e18"
 
+// LED
+#define MICROPY_HW_NEOPIXEL   (&pin_PA27)
+//#define MICROPY_HW_LED_MSC  PIN_PA15 // red
+
+// Do not reset these pins.
 #define MICROPY_PORT_A        (PORT_PA24 | PORT_PA25)
 #define MICROPY_PORT_B        (0)
 #define MICROPY_PORT_C        (0)
@@ -14,6 +17,8 @@
 
 #define BOARD_FLASH_SIZE (0x00040000 - 0x2000 - 0x010000)
 
+#define BOARD_HAS_CRYSTAL   1
+
 #define DEFAULT_I2C_BUS_SCL (&pin_PA23)
 #define DEFAULT_I2C_BUS_SDA (&pin_PA22)