arm64: dts: broadcom: stringray: Fix GICv3 ITS node name

The GICv3 ITS is an MSI controller, therefore its node name should be
'msi-controller'.

While we're here, fix the unit-address which shouldn't have a comma.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230207234709.201229-1-robh@kernel.org


Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>