Allow override of TMC_SW_* pins (#14528)

Marlin/src/pins/pins_ARCHIM2.h

@@ -149,10 +149,16 @@
 // Required for the Archim2 board.
 //
 #if ENABLED(TMC_USE_SW_SPI)
+  #ifndef TMC_SW_MOSI
     #define TMC_SW_MOSI    28   // PD3
+  #endif
+  #ifndef TMC_SW_MISO
     #define TMC_SW_MISO    26   // PD1
+  #endif
+  #ifndef TMC_SW_SCK
     #define TMC_SW_SCK     27   // PD2
   #endif
+#endif
 
 //
 // Temperature Sensors

Marlin/src/pins/pins_BIGTREE_SKR_MINI_V1_1.h

@@ -66,10 +66,16 @@
 #define E0_ENABLE_PIN      PC4
 
 #if ENABLED(TMC_USE_SW_SPI)
+  #ifndef TMC_SW_MOSI
     #define TMC_SW_SCK     PB3
+  #endif
+  #ifndef TMC_SW_MISO
     #define TMC_SW_MISO    PB4
+  #endif
+  #ifndef TMC_SW_SCK
     #define TMC_SW_MOSI    PB5
   #endif
+#endif
 
 //
 // Heaters / Fans

Marlin/src/pins/pins_BIGTREE_SKR_V1.3.h

@@ -103,10 +103,16 @@
 // Software SPI pins for TMC2130 stepper drivers
 //
 #if ENABLED(TMC_USE_SW_SPI)
+  #ifndef TMC_SW_MOSI
     #define TMC_SW_MOSI    P4_28
+  #endif
+  #ifndef TMC_SW_MISO
     #define TMC_SW_MISO    P0_05
+  #endif
+  #ifndef TMC_SW_SCK
     #define TMC_SW_SCK     P0_04
   #endif
+#endif
 
 #if HAS_DRIVER(TMC2208) || HAS_DRIVER(TMC2209)
     /**

Marlin/src/pins/pins_BIQU_B300_V1.0.h

@@ -83,10 +83,16 @@
 // Software SPI pins for TMC2130 stepper drivers
 //
 #if ENABLED(TMC_USE_SW_SPI)
+  #ifndef TMC_SW_MOSI
     #define TMC_SW_MOSI    P0_18   // ETH
+  #endif
+  #ifndef TMC_SW_MISO
     #define TMC_SW_MISO    P0_17   // ETH
+  #endif
+  #ifndef TMC_SW_SCK
     #define TMC_SW_SCK     P0_15   // ETH
   #endif
+#endif
 
 //
 // Temperature Sensors

Marlin/src/pins/pins_MKS_SGEN_L.h

@@ -97,10 +97,16 @@
 // Software SPI pins for TMC2130 stepper drivers
 //
 #if ENABLED(TMC_USE_SW_SPI)
+  #ifndef TMC_SW_MOSI
     #define TMC_SW_MOSI    P4_28
+  #endif
+  #ifndef TMC_SW_MISO
     #define TMC_SW_MISO    P0_05
+  #endif
+  #ifndef TMC_SW_SCK
     #define TMC_SW_SCK     P0_04
   #endif
+#endif
 
 #if HAS_DRIVER(TMC2208) || HAS_DRIVER(TMC2209)
   /**

Marlin/src/pins/pins_RAMPS_RE_ARM.h

@@ -102,10 +102,16 @@
 // Software SPI pins for TMC2130 stepper drivers
 //
 #if ENABLED(TMC_USE_SW_SPI)
+  #ifndef TMC_SW_MOSI
     #define TMC_SW_MOSI    P1_00   // ETH
+  #endif
+  #ifndef TMC_SW_MISO
     #define TMC_SW_MISO    P1_08   // ETH
+  #endif
+  #ifndef TMC_SW_SCK
     #define TMC_SW_SCK     P1_09   // ETH
   #endif
+#endif
 
 #if HAS_DRIVER(TMC2208) || HAS_DRIVER(TMC2209)
   /**