boards: arm: stm32h573 disco kit move partition to ext flash

Add the XSPI 2 which is an octoSPI connection to a octo NOR flash
mx25lm51245 on the stm32h573i_dk disco kit
Define the partition on the 64MBytes space of the external flash
Use the STM32Cube programmer to flash with the corresponding
external loader for XiP mode.
Removing usb_device will avoid test feature for that board.

Signed-off-by: Francois Ramu <francois.ramu@st.com>

Author: FRASTM

boards/st/stm32h573i_dk/stm32h573i_dk.dts

@@ -20,8 +20,8 @@
 		zephyr,shell-uart = &usart1;
 		zephyr,sram = &sram1;
 		zephyr,flash = &flash0;
-		zephyr,code-partition = &slot0_partition;
 		zephyr,canbus = &fdcan1;
+		spi-flash0 = &mx25lm51245;
 	};
 
 	leds {
@@ -192,23 +192,6 @@
 			label = "mcuboot";
 			reg = <0x00000000 DT_SIZE_K(64)>;
 		};
-		slot0_partition: partition@10000 {
-			label = "image-0";
-			reg = <0x00010000 DT_SIZE_K(416)>;
-		};
-		slot1_partition: partition@78000 {
-			label = "image-1";
-			reg = <0x00078000 DT_SIZE_K(416)>;
-		};
-		scratch_partition: partition@e0000 {
-			label = "image-scratch";
-			reg = <0x000e0000 DT_SIZE_K(64)>;
-		};
-		/* Set 64KB of storage at the end of Bank1 */
-		storage_partition: partition@f0000 {
-			label = "storage";
-			reg = <0x000f0000 DT_SIZE_K(64)>;
-		};
 	};
 };
 
@@ -284,14 +267,26 @@
 		status = "okay";
 
 		partitions {
-			   compatible = "fixed-partitions";
-			   #address-cells = <1>;
-			   #size-cells = <1>;
-
-			   partition@0 {
-			       label = "nor";
-			       reg = <0x00000000 DT_SIZE_M(64)>;
-			   };
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			slot0_partition: partition@0 {
+				label = "image-0";
+				reg = <0x00000000 DT_SIZE_M(16)>;
+			};
+			slot1_partition: partition@1000000 {
+				label = "image-1";
+				reg = <0x01000000 DT_SIZE_M(16)>;
+			};
+			scratch_partition: partition@2000000 {
+				label = "image-scratch";
+				reg = <0x02000000 DT_SIZE_M(16)>;
+			};
+			storage_partition: partition@3000000 {
+				label = "storage";
+				reg = <0x03000000 DT_SIZE_M(16)>;
+			};
 		};
 	};
 };

boards/st/stm32h573i_dk/stm32h573i_dk.yaml

@@ -21,7 +21,6 @@ supported:
   - spi
   - octospi
   - can
-  - usb_device
   - i2c
   - rtc
   - usbd