Fixes compile error

Author: GOB52

examples/UnitUnified/UnitFinger/Capture/main/Capture.cpp

@@ -63,7 +63,9 @@ void setup()
     }
     M5_LOGI("getPin: %d,%d", pin_num_in, pin_num_out);
 
-#if SOC_UART_NUM > 2
+#if defined(CONFIG_IDF_TARGET_ESP32C6)
+    auto& s = Serial1;
+#elif SOC_UART_NUM > 2
     auto& s = Serial2;
 #elif SOC_UART_NUM > 1
     auto& s = Serial1;

examples/UnitUnified/UnitFinger/Characteristic/main/Characteristic.cpp

@@ -41,7 +41,9 @@ void setup()
     }
     M5_LOGI("getPin: %d,%d", pin_num_in, pin_num_out);
 
-#if SOC_UART_NUM > 2
+#if defined(CONFIG_IDF_TARGET_ESP32C6)
+    auto& s = Serial1;
+#elif SOC_UART_NUM > 2
     auto& s = Serial2;
 #elif SOC_UART_NUM > 1
     auto& s = Serial1;

examples/UnitUnified/UnitFinger/PlotToSerial/main/PlotToSerial.cpp

@@ -53,7 +53,9 @@ void setup()
     }
     M5_LOGI("getPin: %d,%d", pin_num_in, pin_num_out);
 
-#if SOC_UART_NUM > 2
+#if defined(CONFIG_IDF_TARGET_ESP32C6)
+    auto& s = Serial1;
+#elif SOC_UART_NUM > 2
     auto& s = Serial2;
 #elif SOC_UART_NUM > 1
     auto& s = Serial1;

examples/UnitUnified/UnitFinger/User/main/User.cpp

@@ -125,7 +125,9 @@ void setup()
     }
     M5_LOGI("getPin: %d,%d", pin_num_in, pin_num_out);
 
-#if SOC_UART_NUM > 2
+#if defined(CONFIG_IDF_TARGET_ESP32C6)
+    auto& s = Serial1;
+#elif SOC_UART_NUM > 2
     auto& s = Serial2;
 #elif SOC_UART_NUM > 1
     auto& s = Serial1;