Forcing DEBUG_UART_{PHYS, VIRT} changes when switching between v7 platforms?

[Florian Fainelli]

Hi,

When switching between different Multi v7 platform which all select
DEBUG_UART_8250, whichever platform managed to set
DEBUG_UART_{PHYS,VIRT} first will end-up forcing its value to the
others.

What I am seeing at the moment is for instance enabling BCM_MOBILE
will set DEBUG_UART_PHYS to 0x3e000000, disabling BCM_MOBILE and now
enabling MVEBU won't force a new DEBUG_UART_PHYS address to be
re-computed.

Should we add some sort of specific annotation to the Kconfig symbol
to force a recalculation of the UART PHYS address?

Thanks!
-- 
Florian