[nrf fromtree] mcumgr: Enable permanent updates in overwrite mode

It is essential for the overwrite mode to allow confirming the secondary
slot to provide the permanent update.
This types of updates is the only mode in which the application may be
upgraded.

Signed-off-by: Tomasz Chyrowicz <[email protected]>
(cherry picked from commit cbcf81e)

Author: tomchy

subsys/mgmt/mcumgr/grp/img_mgmt/Kconfig

@@ -118,18 +118,22 @@ config MCUMGR_GRP_IMG_REJECT_DIRECT_XIP_MISMATCHED_SLOT
 	  using the --rom-fixed command line option.
 
 config MCUMGR_GRP_IMG_ALLOW_CONFIRM_NON_ACTIVE_SLOT
-	bool "Allow to confirm non-active slots of any image"
+	bool "Allow to confirm non-active slots of any image" if !MCUBOOT_BOOTLOADER_MODE_OVERWRITE_ONLY
 	depends on MCUBOOT_BOOTLOADER_MODE_DIRECT_XIP_WITH_REVERT || \
 		   MCUBOOT_BOOTLOADER_MODE_RAM_LOAD_WITH_REVERT || \
 		   MCUBOOT_BOOTLOADER_MODE_SWAP_SCRATCH || \
 		   MCUBOOT_BOOTLOADER_MODE_SWAP_USING_MOVE || \
-		   MCUBOOT_BOOTLOADER_MODE_SWAP_USING_OFFSET
+		   MCUBOOT_BOOTLOADER_MODE_SWAP_USING_OFFSET || \
+		   MCUBOOT_BOOTLOADER_MODE_OVERWRITE_ONLY
 	default y
 	help
 	  Allows to confirm non-active slot of any image.
 	  Normally it should not be allowed to confirm any slots via MCUmgr
 	  commands, to prevent confirming something that is broken and was not
 	  verified to boot correctly.
+	  Option always enabled in the overwrite mode, because the permanent
+	  update, that uses the confirm flag, is the intended way to provide
+	  updates.
 
 config MCUMGR_GRP_IMG_FRUGAL_LIST
 	bool "Omit zero, empty or false values from status list"