NUCLEO_F207ZG: change default SPI_MOSI pin to match Arduino standard

Author: jeromecoutant

targets/TARGET_STM/TARGET_STM32F2/TARGET_NUCLEO_F207ZG/PinNames.h

@@ -266,7 +266,7 @@ typedef enum {
     USBRX       = STDIO_UART_RX,
     I2C_SCL     = D15,
     I2C_SDA     = D14,
-    SPI_MOSI    = PB_5, // Conflict between D11 and RMII RX Data Valid (PA7)
+    SPI_MOSI    = D11, // Warning: Conflict between D11 and RMII RX Data Valid (PA7)
     SPI_MISO    = D12,
     SPI_SCK     = D13,
     SPI_CS      = D10,