clk: Remove superfluous gd declarations

The clk uclass was converted to support a live device tree recently,
hence the global data pointer declarations are no longer needed.
Reviewed-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NMario Six <mario.six@gdsys.cc>

drivers/clk/clk-uclass.c

@@ -13,8 +13,6 @@
 #include <dt-structs.h>
 #include <errno.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 static inline const struct clk_ops *clk_dev_ops(struct udevice *dev)
 {
 	return (const struct clk_ops *)dev->driver->ops;

drivers/clk/clk_fixed_rate.c

@@ -8,8 +8,6 @@
 #include <clk-uclass.h>
 #include <dm.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 struct clk_fixed_rate {
 	unsigned long fixed_rate;
 };