As some help is needed from an active maintainer, replace Andrew Victor
by Alexandre Belloni in the ARM/Atmel MAINTAINERS' entry (aka AT91).
Add an entry to the CREDITS file.

Thanks Andrew for the great role you played during the early days of this
product family.

Signed-off-by: Nicolas Ferre <[email protected]>
Acked-by: Andrew Victor <[email protected]>
Acked-by: Alexandre Belloni <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>