fix for ESP32 C6 with >1 motors

Author: runger1101001

src/drivers/hardware_specific/esp32/esp32_driver_mcpwm.cpp

@@ -181,7 +181,7 @@ uint8_t _findNextTimer(int group){
 */
 int _findBestGroup(int no_pins, long pwm_freq, int* group, int* timer){
   // an empty group is always the best option
-  for(int i=0; i<2; i++){
+  for(int i=0; i<SOC_MCPWM_GROUPS; i++){
     if(!group_pins_used[i]){
       *group = i;
       *timer=0; // use the first timer in an empty group
@@ -196,15 +196,15 @@ int _findBestGroup(int no_pins, long pwm_freq, int* group, int* timer){
     // second best option is if there is a group with 
     // pair number of pwms available as we can then 
     // set the pwm frequency 
-    for(int i=0; i<2; i++){
+    for(int i=0; i<SOC_MCPWM_GROUPS; i++){
       if(_hasAvailablePins(i, no_pins+1)) {
         *group=i;
         *timer = _findNextTimer(i);
         return 1;
       }
     }
     // third best option is any group that has enough pins
-    for(int i=0; i<2; i++){
+    for(int i=0; i<SOC_MCPWM_GROUPS; i++){
       if(_hasAvailablePins(i, no_pins)) {
         *group=i;
         *timer = _findLastTimer(i);