dt-bindings: clock: exynosautov9: add dpum clock

Add dpum clock definitions and compatibles.

Also used clock name 'bus' instead of full clock name
dout_clkcmu_dpum_bus like other board cmu schema (GS101).

Signed-off-by: Kwanghoon Son <k.son@samsung.com>
Link: https://lore.kernel.org/r/20240809-clk_dpum-v3-1-359decc30fe2@samsung.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>