boards: arm: v2m_musca_s1: Fix unit and first address mismatch

[rettichschnidi]

This fixes the following warnings:

unit address and first address in 'reg' (0xa080000) don't match for
/mram@a080400

[ithinuel]

Do you have any reason to pick one of the value over the other one?
I tried to find some data to coroborate. If anything TF-M’s layout would go for 0xA080000 but the extra kilobyte (0x400) could be to accomodate an MCUBoot header.
I’m not familiar enough to confirm this is correct either way.

[rettichschnidi]

Do you have any reason to pick one of the value over the other one?

My understanding is that the reg value is what actually ends up in the build. Therefore, I adapted the "cosmetic" value to match it. The result is that the warning is gone, while the resulting binary is not changed at all.

[rettichschnidi]

Not a proof, but my other 10+ PRs using the same kind of fix have been accepted: #78253

[henrikbrixandersen]

Do you have any reason to pick one of the value over the other one?

My understanding is that the reg value is what actually ends up in the build. Therefore, I adapted the "cosmetic" value to match it. The result is that the warning is gone, while the resulting binary is not changed at all.

Correct.