Add default SPI pin definitions if not defined in pins_arduino.h (#7161)

* add default SPI pins ifndef in arduino_pins.h

* Revert "add default SPI pins ifndef in arduino_pins.h"

This reverts commit be35b83.

* Add missing default SPI pins

* revert change for d32_pro

Author: P-R-O-C-H-Y

variants/d32_pro/pins_arduino.h

@@ -9,7 +9,6 @@ static const uint8_t LED_BUILTIN = 5;
 #define LED_BUILTIN LED_BUILTIN
 static const uint8_t _VBAT = 35; // battery voltage
 
-
 #define TF_CS   4  // TF (Micro SD Card) CS pin
 #define TS_CS   12 // Touch Screen CS pin
 #define TFT_CS  14 // TFT CS pin

variants/metro_esp-32/pins_arduino.h

@@ -22,4 +22,9 @@ static const uint8_t SCL = 22;
 
 static const uint8_t ADR = 12;
 
+static const uint8_t SS    = 5;
+static const uint8_t MOSI  = 23;
+static const uint8_t MISO  = 19;
+static const uint8_t SCK   = 18;
+
 #endif /* Pins_Arduino_h */

variants/wt32-eth01/pins_arduino.h

@@ -52,4 +52,14 @@ static const uint8_t RXD2 = 5, RXD = 5;
 static const uint8_t TX = 1;
 static const uint8_t RX = 3;
 
+//SPI VSPI default pins
+static const uint8_t SS    = -1;
+static const uint8_t MOSI  = 15;
+static const uint8_t MISO  = 12;
+static const uint8_t SCK   = 14;
+
+//I2C default pins
+static const uint8_t SDA = 2;
+static const uint8_t SCL = 4;
+
 #endif /* Pins_Arduino_h */