treewide: Remove clk_free

This function is a no-op. Remove it.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Link: https://lore.kernel.org/r/20231216193843.2463779-3-seanga2@gmail.com
diff --git a/arch/mips/mach-pic32/cpu.c b/arch/mips/mach-pic32/cpu.c
index 3181a94..668adbb 100644
--- a/arch/mips/mach-pic32/cpu.c
+++ b/arch/mips/mach-pic32/cpu.c
@@ -30,7 +30,6 @@
 	int ret;
 	struct udevice *dev;
 	struct clk clk;
-	ulong rate;
 
 	ret = uclass_get_device(UCLASS_CLK, 0, &dev);
 	if (ret) {
@@ -43,11 +42,7 @@
 	if (ret < 0)
 		return ret;
 
-	rate = clk_get_rate(&clk);
-
-	clk_free(&clk);
-
-	return rate;
+	return clk_get_rate(&clk);
 }
 
 static ulong clk_get_cpu_rate(void)