dts: bindings: clock: add nordic,nrf-auxpll

Introduce Nordic NRF AUXPLL binding include.

Signed-off-by: David Jewsbury <david.jewsbury@nordicsemi.no>

Author: Hi-Im-David

dts/bindings/clock/nordic,nrf-auxpll.yaml

@@ -43,7 +43,7 @@ properties:
     required: true
     description: |
       Value used to set the fractional PLL divider ratio (can be set between
-      divider ratios 4 to 5). Valid values range from 0 to 65535.
+      divider ratios 4 to 5). Valid values shown in dt-bindings/clock/nrf-auxpll.h.
 
   nordic,out-div:
     type: int

include/zephyr/dt-bindings/clock/nrf-auxpll.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_NRF_AUXPLL_H_
+#define ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_NRF_AUXPLL_H_
+
+#define NRF_AUXPLL_FREQ_DIV_MIN        0
+#define NRF_AUXPLL_FREQ_DIV_AUDIO_44K1 15309
+#define NRF_AUXPLL_FREQ_DIV_USB24M     32768
+#define NRF_AUXPLL_FREQ_DIV_AUDIO_48K  39845
+#define NRF_AUXPLL_FREQ_DIV_MAX        65535
+
+#endif /* #define ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_NRF_AUXPLL_H_ */