i2c detect bugfix

The Adafruit MCP23017 class doesn't take the direct address but uses a base of `0x20`. This was missed on the detect.

Author: alex-code

MRSC/main.cpp

@@ -444,7 +444,7 @@ void setup() {
 
   for (uint8_t c = 0; c < BOARD_COUNT; c++) {
     // Setup the MCP23017 & PCA9685 boards
-    if (detect(MCP_ADDRESSES[c]) && detect(PCA_ADDRESSES[c])) {
+    if (detect(MCP23017_ADDRESS | MCP_ADDRESSES[c]) && detect(PCA_ADDRESSES[c])) {
       #if __cplusplus >= 201402L
       boards[c] = {
         Switches::initialize(MCP_ADDRESSES[c]),