Fix cast warning in Gen7

Marlin/Debug/Marlin.lastbuildstate

-#v4.0:v100
-Debug|Win32|C:\Users\Blair\Desktop\Marlin_v1\Marlin\|

Marlin/Gen7/cores/arduino/pins_arduino.c

 const uint8_t PROGMEM port_to_mode_PGM[] =
 {
 	NOT_A_PORT,
-    &DDRA,
-	&DDRB,
-	&DDRC,
-	&DDRD,
+        (uint8_t) &DDRA,
+	(uint8_t) &DDRB,
+	(uint8_t) &DDRC,
+	(uint8_t) &DDRD,
 };
 
 const uint8_t PROGMEM port_to_output_PGM[] =
 {
 	NOT_A_PORT,
-	&PORTA,
-	&PORTB,
-	&PORTC,
-	&PORTD,
+	(uint8_t) &PORTA,
+	(uint8_t) &PORTB,
+	(uint8_t) &PORTC,
+	(uint8_t) &PORTD,
 };
 
 const uint8_t PROGMEM port_to_input_PGM[] =
 {
 	NOT_A_PORT,
-	&PINA,
-	&PINB,
-	&PINC,
-	&PIND,
+	(uint8_t) &PINA,
+	(uint8_t) &PINB,
+	(uint8_t) &PINC,
+	(uint8_t) &PIND,
 };
 
 const uint8_t PROGMEM digital_pin_to_port_PGM[] =