Fix TEMP_PROBE_PIN for SKR 1.4

Co-Authored-By: Anthrix <anthrix@users.noreply.github.com>

Marlin/src/pins/lpc1768/pins_BTT_SKR_common.h

 #ifndef TEMP_BED_PIN
   #define TEMP_BED_PIN     P0_23_A0   // A0 (T0) - (67) - TEMP_BED_PIN
 #endif
+
 #if HOTENDS == 1 && TEMP_SENSOR_PROBE
-  #define TEMP_PROBE_PIN   P0_25_A2   // TEMP_1_PIN
+  #define TEMP_PROBE_PIN   TEMP_1_PIN
 #endif
 
 //