Update examples/Central/ScanCallback/ScanCallback.ino

Co-Authored-By: Frederic Pillon <frederic.pillon@st.com>

Author: cparata

examples/Central/ScanCallback/ScanCallback.ino

@@ -38,7 +38,7 @@ BLELocalDevice BLE(&HCISpiTransport); */
 HCISpiTransportClass HCISpiTransport(SpiHCI, BLUENRG_M2SP, A1, A0, D7, 1000000, SPI_MODE1);
 BLELocalDevice BLE(&HCISpiTransport); */
 /* Shield BNRG2A1 with SPI clock on D13 */
-/*SPIClass SpiHCI(D11, D12, D13);
+/*#define SpiHCI SPI
 HCISpiTransportClass HCISpiTransport(SpiHCI, BLUENRG_M2SP, A1, A0, D7, 1000000, SPI_MODE1);
 BLELocalDevice BLE(&HCISpiTransport); */
 #endif