arm64: dts: nuvoton: add refclk and update peripheral clocks for NPCM845

arm64: dts: nuvoton: add refclk and update peripheral clocks for NPCM845

Add a 25 MHz fixed-clock node (refclk) in the NPCM845-EVB board device
tree to represent the external reference clock used by the NPCM845 reset
and clock controller.

Update peripherals (timer0, watchdog0-2) in the NPCM845 device tree to
reference this refclk directly instead of the previous clock controller
output (NPCM8XX_CLK_REFCLK).

Depends-on: arm64: dts: nuvoton: Combine NPCM845 reset and clk nodes

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Link: https://patch.msgid.link/20250706134207.2168184-3-tmaimon77@gmail.com
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>