ARM: bcm2835: dt: Fix i2c0 node name

Device tree node names should contain the node's reg property address value.
The i2c0 node was apparently forgotten in commit 25b2f1bd (ARM: bcm2835:
node name unit address cleanup).

Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Lee Jones <lee.jones@linaro.org>