SOFT_RESET_VIA_SERIAL sanity-check

Marlin/src/inc/SanityCheck.h

@@ -2215,8 +2215,11 @@ static_assert(hbm[Z_AXIS] >= 0, "HOMING_BUMP_MM.Z must be greater than or equal
 #endif
 
 /**
- * Software Reset on Kill option
+ * Software Reset options
  */
+#if ENABLED(SOFT_RESET_VIA_SERIAL) && DISABLED(EMERGENCY_PARSER)
+  #error "EMERGENCY_PARSER is required to activate SOFT_RESET_VIA_SERIAL."
+#endif
 #if ENABLED(SOFT_RESET_ON_KILL) && !BUTTON_EXISTS(ENC)
   #error "An encoder button is required or SOFT_RESET_ON_KILL will reset the printer without notice!"
 #endif