Fix three extruder with auto-fan build (#17035)

Marlin/src/core/macros.h

@@ -473,7 +473,7 @@
     ( DEFER2(__RREPEAT2)()(ADD1(_RPT_I),SUB1(_RPT_N),_RPT_OP,V) ) \
     ( /* Do nothing */ )
 #define __RREPEAT2() _RREPEAT2
-#define RREPEAT_S(S,N,OP)        EVAL(_RREPEAT(S,SUB##S(N),OP))
+#define RREPEAT_S(S,N,OP)        EVAL1024(_RREPEAT(S,SUB##S(N),OP))
 #define RREPEAT(N,OP)            RREPEAT_S(0,N,OP)
-#define RREPEAT2_S(S,N,OP,V...)  EVAL(_RREPEAT2(S,SUB##S(N),OP,V))
+#define RREPEAT2_S(S,N,OP,V...)  EVAL1024(_RREPEAT2(S,SUB##S(N),OP,V))
 #define RREPEAT2(N,OP,V...)      RREPEAT2_S(0,N,OP,V)

buildroot/share/tests/BIGTREE_SKR_PRO-tests

@@ -14,5 +14,16 @@ opt_set MOTHERBOARD BOARD_BTT_SKR_PRO_V1_1
 opt_set SERIAL_PORT 1
 exec_test $1 $2 "BigTreeTech SKR Pro Default Configuration"
 
+restore_configs
+opt_set MOTHERBOARD BOARD_BTT_SKR_PRO_V1_1
+opt_set SERIAL_PORT -1
+opt_set EXTRUDERS 3
+opt_set TEMP_SENSOR_1 1
+opt_set TEMP_SENSOR_2 1
+opt_set E0_AUTO_FAN_PIN PC10
+opt_set E1_AUTO_FAN_PIN PC11
+opt_set E2_AUTO_FAN_PIN PC12
+exec_test $1 $2 "BigTreeTech SKR Pro 3 Extruders with Auto-Fan"
+
 # clean up
 restore_configs