feat(nxp-clk): add a basic get_rate implementation

Replace the dummy implementation of clk_ops.get_rate with a basic
version that only handles the oscillator objects. Subsequent commits
will add more objects to this list.

Change-Id: I8c1bbbfa6b116fdcf5a1f1353bdb52b474bac831
Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
diff --git a/drivers/nxp/clk/s32cc/s32cc_clk_modules.c b/drivers/nxp/clk/s32cc/s32cc_clk_modules.c
index 71055ab..f7af465 100644
--- a/drivers/nxp/clk/s32cc/s32cc_clk_modules.c
+++ b/drivers/nxp/clk/s32cc/s32cc_clk_modules.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2024 NXP
+ * Copyright 2020-2025 NXP
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -20,7 +20,7 @@
 	S32CC_MODULE_CLK(fxosc);
 
 static struct s32cc_osc firc =
-	S32CC_OSC_INIT(S32CC_FIRC);
+	S32CC_OSC_INIT_FREQ(S32CC_FIRC, 48 * MHZ);
 static struct s32cc_clk firc_clk =
 	S32CC_MODULE_CLK(firc);