riscv: dts: spacemit: reorder i2c2 node

riscv: dts: spacemit: reorder i2c2 node

Reorder the i2c2 node to its correct position according to its
register address.This improves the readability and maintainability
of the device tree file by adhering to the established ordering convention.

No functional change is introduced by this reordering.

Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
Link: https://lore.kernel.org/r/20251105-k1-add-i2c-node-v1-1-d18dae246137@linux.spacemit.com
Signed-off-by: Yixun Lan <dlan@gentoo.org>