renesas-ra/boards: Add named pins for Arduino Portenta C33.

Signed-off-by: Sebastian Romero <s.romero@arduino.cc>

ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/pins.csv

@@ -144,12 +144,29 @@ D2,P111
 D3,P303
 D4,P401
 D5,P210
+D6,P601
+D7,P402
+D8,P900
+D9,P204
+D10,P315
+D11,P407
+D12,P408
+D13,P110
+D14,P602
 LED1,P107
 LED2,P400
 LED3,P800
 LEDR,P107
 LEDG,P400
 LEDB,P800
+LED_BUILTIN,P400
 LED_RED,P107
 LED_GREEN,P400
 LED_BLUE,P800
+COPI,P900
+CIPO,P315
+SCK,P204
+CS,P402
+SS,P402
+UART_TX,P602
+UART_RX,P110