OMAP3 clock: use pr_debug() rather than pr_info() in some clock change code

The CORE DPLL M2 frequency change code should use pr_debug(), not
pr_info(), for its debug messages.  Same with
omap2_clksel_round_rate_div().  While here, convert a few printk(KERN_ERR ..
into pr_err().

Signed-off-by: Paul Walmsley <paul@pwsan.com>
diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 4247a15..8935a8b 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -547,8 +547,8 @@
 	const struct clksel_rate *clkr;
 	u32 last_div = 0;
 
-	printk(KERN_INFO "clock: clksel_round_rate_div: %s target_rate %ld\n",
-	       clk->name, target_rate);
+	pr_debug("clock: clksel_round_rate_div: %s target_rate %ld\n",
+		 clk->name, target_rate);
 
 	*new_div = 1;
 
@@ -562,7 +562,7 @@
 
 		/* Sanity check */
 		if (clkr->div <= last_div)
-			printk(KERN_ERR "clock: clksel_rate table not sorted "
+			pr_err("clock: clksel_rate table not sorted "
 			       "for clock %s", clk->name);
 
 		last_div = clkr->div;
@@ -574,7 +574,7 @@
 	}
 
 	if (!clkr->div) {
-		printk(KERN_ERR "clock: Could not find divisor for target "
+		pr_err("clock: Could not find divisor for target "
 		       "rate %ld for clock %s parent %s\n", target_rate,
 		       clk->name, clk->parent->name);
 		return ~0;
@@ -582,8 +582,8 @@
 
 	*new_div = clkr->div;
 
-	printk(KERN_INFO "clock: new_div = %d, new_rate = %ld\n", *new_div,
-	       (clk->parent->rate / clkr->div));
+	pr_debug("clock: new_div = %d, new_rate = %ld\n", *new_div,
+		 (clk->parent->rate / clkr->div));
 
 	return (clk->parent->rate / clkr->div);
 }