arm64: dts: imx93: update anatop node

The anatop module produces PLL and OSC for Clock Controller Module. Since
the binding doc has been updated to clock-controller for this module,
Let's also update the device tree node.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>