Merge pull request #261 from pennam/fix_portenta_h7_part

boards: portentah7: Fix partition size

Author: pillo79

variants/arduino_portenta_h7_stm32h747xx_m7/arduino_portenta_h7_stm32h747xx_m7.overlay

@@ -281,18 +281,13 @@
 
 					boot_partition: partition@0 {
 							label = "mcuboot";
-							reg = <0x00000000 0x00020000>;
+							reg = <0x00000000 0x00040000>;
 							read-only;
 					};
 
-					scratch_partition: partition@20000 {
-							label = "image-scratch";
-							reg = <0x00020000 0x00020000>;
-					};
-
 					slot0_partition: partition@40000 {
 							label = "image-0";
-							reg = <0x00040000 0x000C0000>;
+							reg = <0x00040000 0x000A0000>;
 					};
 
 					user_sketch: partition@e0000 {