Merge pull request #517 from firmata/UnoR4_2

Fix compilation for UNOR4

Boards.h

@@ -464,13 +464,8 @@ writePort(port, value, bitmask):  Write an 8 bit port.
 #define TOTAL_ANALOG_PINS       8
 #define TOTAL_PINS              22 // 14 digital + 8 analog
 #endif
-// These have conflicting(?) definitions in the core for this CPU
-#undef IS_PIN_PWM
-#undef IS_PIN_ANALOG
 #define VERSION_BLINK_PIN       13
 #define IS_PIN_DIGITAL(p)       ((p) >= 2 && (p) <= 19)
-#define IS_PIN_ANALOG(p)        ((p) >= 14 && (p) < 14 + TOTAL_ANALOG_PINS)
-#define IS_PIN_PWM(p)           digitalPinHasPWM(p)
 #define IS_PIN_SERVO(p)         (IS_PIN_DIGITAL(p) && (p) - 2 < MAX_SERVOS)
 #define IS_PIN_I2C(p)           ((p) == 18 || (p) == 19)
 #define IS_PIN_SPI(p)           ((p) == SS || (p) == MOSI || (p) == MISO || (p) == SCK)