dt-bindings: clock: rk3568: Add SCMI clock ids

The Trusted Firmware on RK3568 exposes 3 clocks via the SCMI clock
interface. Add descriptive IDs for them.

The clock ids are used in both the older vendor-binary TF-A, as well
as the recently merged upstream SCMI clock implementation.

Link: https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/31265
Reviewed-by: Diederik de Haas <diederik@cknow-tech.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20251103234926.416137-2-heiko@sntech.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: mmind

include/dt-bindings/clock/rk3568-cru.h

@@ -485,6 +485,12 @@
 
 #define CLK_NR_CLKS		(PCLK_CORE_PVTM + 1)
 
+/* scmi-clocks indices */
+
+#define SCMI_CLK_CPU		0
+#define SCMI_CLK_GPU		1
+#define SCMI_CLK_NPU		2
+
 /* pmu soft-reset indices */
 /* pmucru_softrst_con0 */
 #define SRST_P_PDPMU_NIU	0