arm64: dts: renesas: rzg2l-smarc: Drop clock-frequency from camera sensor node

arm64: dts: renesas: rzg2l-smarc: Drop clock-frequency from camera sensor node

The clock-frequency for camera sensors has been deprecated in favour of
the assigned-clocks and assigned-clock-rates properties. As the clock
source for the sensor is a fixed-frequency oscillator, simply drop the
clock-frequency.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Mehdi Djait <mehdi.djait@linux.intel.com>
Link: https://patch.msgid.link/20250812214620.30425-73-laurent.pinchart@ideasonboard.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>