dt-bindings: timer: Add power-domains for TI timer-dm on K3

dt-bindings: timer: Add power-domains for TI timer-dm on K3

On K3 SoCs, the power-domains property is needed. On the earlier SoCs,
the power-domains property is handled by the interconnect target module
parent device.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Nishanth Menon <nm@ti.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220919112357.64997-1-tony@atomide.com
Signed-off-by: Rob Herring <robh@kernel.org>