dfu: boot: mcuboot_shell: Prevent erasing MCUboot/app flash areas

[nordicjm]

Prevents the user from potentially bricking a device by erasing
the MCUboot or currently running application flash areas with the
mcuboot erase command

Fixes #60443

[TirelessDev]

Hey @nordicjm, sorry to dig up an old PR, but this appears to break in situations when partition manager is in play because the dts specified partitions do not match those in the flash map which is used to perform the erase. As it occurs in my own project the external flash area turns out to be area 1 while the internal active partition is actually area 3. This clashes with the defines generated from the device tree which place the active partition as area 1 and thus the erase is blocked.

Are there any tricks I am missing that might address this mismatch?

[nordicjm]

Hey @nordicjm, sorry to dig up an old PR, but this appears to break in situations when partition manager is in play because the dts specified partitions do not match those in the flash map which is used to perform the erase. As it occurs in my own project the external flash area turns out to be area 1 while the internal active partition is actually area 3. This clashes with the defines generated from the device tree which place the active partition as area 1 and thus the erase is blocked.

Are there any tricks I am missing that might address this mismatch?

nrfconnect/sdk-zephyr#2114 should fix the issues you are seeing

[TirelessDev]

Legend, cheers!