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/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index fba3595..c6d50fd 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -70,13 +70,7 @@
 	if (ret)
 		return -EINVAL;
 
-	ret = clk_enable(&clk);
-	if (ret)
-		return ret;
-
-	clk_free(&clk);
-
-	return 0;
+	return clk_enable(&clk);
 }
 
 static int ehci_atmel_probe(struct udevice *dev)