Clear up some more compile warnings

Marlin/src/HAL/HAL_DUE/usb/uotghs_device_due.h

@@ -290,6 +290,7 @@ extern "C" {
   //! Bounds given integer size to allowed range and rounds it up to the nearest
   //! available greater size, then applies register format of UOTGHS controller
   //! for endpoint size bit-field.
+#undef udd_format_endpoint_size
 #define udd_format_endpoint_size(size)            (32 - clz(((uint32_t)MIN(MAX(size, 8), 1024) << 1) - 1) - 1 - 3)
   //! Configures the selected endpoint size
 #define udd_configure_endpoint_size(ep, size)     (Wr_bitfield(UOTGHS_ARRAY(UOTGHS_DEVEPTCFG[0], ep), UOTGHS_DEVEPTCFG_EPSIZE_Msk, udd_format_endpoint_size(size)))

Marlin/src/HAL/HAL_LPC1768/u8g_com_HAL_LPC1768_st7920_sw_spi.cpp

@@ -70,7 +70,6 @@ static uint8_t SPI_speed = 0;
 static uint8_t rs_last_state = 255;
 
 static void u8g_com_LPC1768_st7920_write_byte_sw_spi(uint8_t rs, uint8_t val) {
-  uint8_t i;
 
   if (rs != rs_last_state) {  // time to send a command/data byte
     rs_last_state = rs;

Marlin/src/feature/bedlevel/ubl/ubl_motion.cpp

@@ -443,7 +443,7 @@
       uint16_t segments = lroundf(cartesian_xy_mm * (1.0 / (DELTA_SEGMENT_MIN_LENGTH))); // cartesian fixed segment length
     #endif
 
-    NOLESS(segments, 1);                        // must have at least one segment
+    NOLESS(segments, 1U);                        // must have at least one segment
     const float inv_segments = 1.0 / segments;  // divide once, multiply thereafter
 
     #if IS_SCARA // scale the feed rate from mm/s to degrees/s

Marlin/src/gcode/lcd/M300.cpp

@@ -37,7 +37,7 @@ void GcodeSuite::M300() {
   uint16_t duration = parser.ushortval('P', 1000);
 
   // Limits the tone duration to 0-5 seconds.
-  NOMORE(duration, 5000);
+  NOMORE(duration, 5000U);
 
   BUZZ(duration, frequency);
 }

Marlin/src/module/motion.cpp

@@ -570,7 +570,7 @@ float soft_endstop_min[XYZ] = { X_MIN_BED, Y_MIN_BED, Z_MIN_POS },
     #endif
 
     // At least one segment is required
-    NOLESS(segments, 1);
+    NOLESS(segments, 1U);
 
     // The approximate length of each segment
     const float inv_segments = 1.0 / float(segments),
@@ -717,7 +717,7 @@ float soft_endstop_min[XYZ] = { X_MIN_BED, Y_MIN_BED, Z_MIN_POS },
       // The length divided by the segment size
       // At least one segment is required
       uint16_t segments = cartesian_mm / segment_size;
-      NOLESS(segments, 1);
+      NOLESS(segments, 1U);
 
       // The approximate length of each segment
       const float inv_segments = 1.0 / float(segments),