clk/ti/adpll: allocate room for terminating null

The buffer allocated in ti_adpll_clk_get_name doesn't account for the
terminating null. This patch switches to devm_kasprintf to avoid
overflowing.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lkml.kernel.org/r/20191019140634.15596-1-steve@sk2.orgAcked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/ti/adpll.c

@@ -194,15 +194,8 @@ static const char *ti_adpll_clk_get_name(struct ti_adpll_data *d,
 		if (err)
 			return NULL;
 	} else {
-		const char *base_name = "adpll";
-		char *buf;
-
-		buf = devm_kzalloc(d->dev, 8 + 1 + strlen(base_name) + 1 +
-				    strlen(postfix), GFP_KERNEL);
-		if (!buf)
-			return NULL;
-		sprintf(buf, "%08lx.%s.%s", d->pa, base_name, postfix);
-		name = buf;
+		name = devm_kasprintf(d->dev, GFP_KERNEL, "%08lx.adpll.%s",
+				      d->pa, postfix);
 	}
 
 	return name;