modules: hal_silabs: Simplify HFRCO frequency selection

Recent versions of the HAL rely on interpreting the HFRCO frequency
selection as a plain integer in preprocessor comparisons. The
adaptation layer in Zephyr created a C expression that was not
possible to evaluate by the preprocessor. Simplify the logic to
directly passing the devicetree value to the driver.

This slightly changes the behavior of the code by no longer accepting
arbitrary frequencies and mapping them to the closest HFRCO band.
However, the binding documentation already states that the frequency
should match the band.

Signed-off-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>

Author: asmellby

modules/hal_silabs/simplicity_sdk/config/sl_clock_manager_oscillator_config.h

@@ -29,22 +29,7 @@
 	(DT_ENUM_IDX(DT_NODELABEL(lfxo), timeout) << _LFXO_CFG_TIMEOUT_SHIFT)
 
 /* HFRCODPLL */
-#define SL_CLOCK_MANAGER_HFRCO_BAND                                                                \
-	(DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 1500000    ? 1000000U                 \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 3000000  ? 2000000U                 \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 5500000  ? 4000000U                 \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 10000000 ? 7000000U                 \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 14500000 ? 13000000U                \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 17500000 ? 16000000U                \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 23000000 ? 19000000U                \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 29000000 ? 26000000U                \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 35000000 ? 32000000U                \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 44000000 ? 38000000U                \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 52000000 ? 48000000U                \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 60000000 ? 56000000U                \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 72000000 ? 64000000U                \
-	 : DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency) < 90000000 ? 80000000U                \
-									: 100000000U)
+#define SL_CLOCK_MANAGER_HFRCO_BAND    DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency)
 #define SL_CLOCK_MANAGER_HFRCO_DPLL_EN DT_NUM_CLOCKS(DT_NODELABEL(hfrcodpll))
 #define SL_CLOCK_MANAGER_DPLL_FREQ     DT_PROP(DT_NODELABEL(hfrcodpll), clock_frequency)
 #define SL_CLOCK_MANAGER_DPLL_N        DT_PROP(DT_NODELABEL(hfrcodpll), dpll_n)