Improve and fix MAX31865

Marlin/Configuration_adv.h

@@ -142,11 +142,20 @@
  *   FORCE_HW_SPI:   Ignore SCK/MOSI/MISO pins and just use the CS pin & default SPI bus.
  *   MAX31865_WIRES: Set the number of wires for the probe connected to a MAX31865 board, 2-4. Default: 2
  *   MAX31865_50HZ:  Enable 50Hz filter instead of the default 60Hz.
+ *   MAX31865_USE_READ_ERROR_DETECTION: Detects random read errors from value spikes (a 20°C difference in less than 1sec)
+ *   MAX31865_USE_AUTO_MODE: Faster and more frequent reads than 1-shot, but bias voltage always on, slightly affecting RTD temperature.
+ *   MAX31865_MIN_SAMPLING_TIME_MSEC: in 1-shot mode, the minimum time between subsequent reads. This reduces the effect of bias voltage by leaving the sensor unpowered for longer intervals.
+ *   MAX31865_WIRE_OHMS: In 2-wire configurations, manually set the wire resistance for more accurate readings
  */
 //#define TEMP_SENSOR_FORCE_HW_SPI
 //#define MAX31865_SENSOR_WIRES_0 2
 //#define MAX31865_SENSOR_WIRES_1 2
 //#define MAX31865_50HZ_FILTER
+//#define MAX31865_USE_READ_ERROR_DETECTION
+//#define MAX31865_USE_AUTO_MODE
+//#define MAX31865_MIN_SAMPLING_TIME_MSEC 100
+//#define MAX31865_WIRE_OHMS_0 0.0f
+//#define MAX31865_WIRE_OHMS_1 0.0f
 
 /**
  * Hephestos 2 24V heated bed upgrade kit.

Marlin/src/inc/Conditionals_adv.h

@@ -159,6 +159,9 @@
     #ifndef MAX31865_SENSOR_WIRES_0
       #define MAX31865_SENSOR_WIRES_0 2
     #endif
+    #ifndef MAX31865_WIRE_OHMS_0
+      #define MAX31865_WIRE_OHMS_0 0.0f
+    #endif
   #elif TEMP_SENSOR_0 == -3
     #define TEMP_SENSOR_0_IS_MAX31855 1
     #define TEMP_SENSOR_0_MAX_TC_TMIN -270
@@ -193,6 +196,9 @@
     #ifndef MAX31865_SENSOR_WIRES_1
       #define MAX31865_SENSOR_WIRES_1 2
     #endif
+    #ifndef MAX31865_WIRE_OHMS_1
+      #define MAX31865_WIRE_OHMS_1 0.0f
+    #endif
   #elif TEMP_SENSOR_1 == -3
     #define TEMP_SENSOR_1_IS_MAX31855 1
     #define TEMP_SENSOR_1_MAX_TC_TMIN -270