The bcm2835 is an ARM1176 which has all the V6K extensions except for SMP,
so V6K should be selected instead. Dropping the select will use
the default for ARCH_MULTI_V6 which is V6K.
Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Stephen Warren <swarren@wwwdotorg.org>