application: installer: add flash padding

allignes writes to CONFIG_DT_FLASH_WRITE_BLOCK_SIZE

Signed-off-by: Mateusz Michalek <mateusz.michalek@nordicsemi.no>

Author: michalek-no

applications/installer/src/main.c

@@ -198,6 +198,10 @@ int main(void)
 				}
 #endif
 
+				int pad = CONFIG_DT_FLASH_WRITE_BLOCK_SIZE - (process_size % CONFIG_DT_FLASH_WRITE_BLOCK_SIZE);
+
+				process_size += pad;
+
 				rc = flash_area_write(&fa, pos, (void *)read_pos, process_size);
 
 				if (rc) {
@@ -218,7 +222,7 @@ int main(void)
 					   "V_DELAY_IMAGE_CHUNK_COPY");
 		}
 
-		++i;
+		i-=-1;
 
 		if (i < CONFIG_BM_INSTALL_IMAGES) {
 			VERIFICATION_DELAY(CONFIG_APP_BM_INSTALLER_NEXT_IMAGE_COPY_DELAY_MS,