Merge pull request #6985 from Kaibob2/patch-1

Fix for #6980 (case_light compile problem when EXTENDED_CAPABILITIES_REPORT is enabled)

Marlin/Marlin_main.cpp

     // CASE LIGHTS (M355)
     #if HAS_CASE_LIGHT
       SERIAL_PROTOCOLLNPGM("Cap:TOGGLE_LIGHTS:1");
-      bool USEABLE_HARDWARE_PWM(uint8_t pin);
       if (USEABLE_HARDWARE_PWM(CASE_LIGHT_PIN)) {
         SERIAL_PROTOCOLLNPGM("Cap:CASE_LIGHT_BRIGHTNESS:1");
       }