clk: define LOG_CATEGORY for generic and ccf clocks

Define LOG_CATEGORY to allow filtering with log command
for generic clock and CCF clocks.

This patch also change existing printf, debug and pr_ macro
to log_ or dev_ macro.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c
index fd746f2..b49946f 100644
--- a/drivers/clk/clk-mux.c
+++ b/drivers/clk/clk-mux.c
@@ -21,12 +21,16 @@
  * clock.
  */
 
+#define LOG_CATEGORY UCLASS_CLK
+
 #include <common.h>
 #include <clk.h>
 #include <clk-uclass.h>
+#include <log.h>
 #include <malloc.h>
 #include <asm/io.h>
 #include <dm/device.h>
+#include <dm/device_compat.h>
 #include <dm/devres.h>
 #include <dm/uclass.h>
 #include <linux/bitops.h>
@@ -124,7 +128,7 @@
 
 	index = clk_fetch_parent_index(clk, parent);
 	if (index < 0) {
-		printf("Could not fetch index\n");
+		log_err("Could not fetch index\n");
 		return index;
 	}
 
@@ -170,7 +174,7 @@
 	if (clk_mux_flags & CLK_MUX_HIWORD_MASK) {
 		width = fls(mask) - ffs(mask) + 1;
 		if (width + shift > 16) {
-			pr_err("mux value exceeds LOWORD field\n");
+			dev_err(dev, "mux value exceeds LOWORD field\n");
 			return ERR_PTR(-EINVAL);
 		}
 	}