arm: mvebu: Fix compile for multiplatform when ARMv6 is selected

[Olof Johansson]

On Fri, Jan 11, 2013 at 12:05:31PM -0800, Tony Lindgren wrote:
> Some systems compile in both ARMv6 and ARMv7 into multiplatform
> configurations. This means the default compiler flags are for ARMv6,
> and we will get:
> 
> arch/arm/mach-mvebu/coherency_ll.S: Assembler messages:
> arch/arm/mach-mvebu/coherency_ll.S:45: Error: selected processor does not support `dsb'
> 
> Fix this by specifying ARMv7 flags for coherency_ll.o.
> 
> Signed-off-by: Tony Lindgren <tony at atomide.com>

Applied to fixes, I don't expect Jason or others to complain about this
so I took the liberty. :)


-Olof