bcm281xx: clock: avoid possible NULL dereference

It does not make sense first to dereference c and then
to check if it is NULL.

The problem was indicated by cppcheck.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

arch/arm/cpu/armv7/bcm281xx/clk-core.c

@@ -479,9 +479,9 @@ unsigned long clk_get_rate(struct clk *c)
 {
 	unsigned long rate;
 
-	debug("%s: %s\n", __func__, c->name);
 	if (!c || !c->ops || !c->ops->get_rate)
 		return 0;
+	debug("%s: %s\n", __func__, c->name);
 
 	rate = c->ops->get_rate(c);
 	debug("%s: rate = %ld\n", __func__, rate);
@@ -493,9 +493,9 @@ int clk_set_rate(struct clk *c, unsigned long rate)
 {
 	int ret;
 
-	debug("%s: %s rate=%ld\n", __func__, c->name, rate);
 	if (!c || !c->ops || !c->ops->set_rate)
 		return -EINVAL;
+	debug("%s: %s rate=%ld\n", __func__, c->name, rate);
 
 	if (c->use_cnt)
 		return -EINVAL;