arm64: dts: fvp: Fix SMMU DT node

The SMMU name in the RevC FVP DT file was not fully binding compliant.

Adjust the node name to match the binding's list of allowed names, also
shuffle the order of the interrupts to comply with the expected order.

Link: https://lore.kernel.org/r/20200513103016.130417-15-andre.przywara@arm.com


Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>