timer: dw-apb: remove unused DECLARE_GLOBAL_DATA_PTR

The dw-apb timer does not use 'gd', so remove its declaration.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
diff --git a/drivers/timer/dw-apb-timer.c b/drivers/timer/dw-apb-timer.c
index cb48801..86312b8 100644
--- a/drivers/timer/dw-apb-timer.c
+++ b/drivers/timer/dw-apb-timer.c
@@ -17,8 +17,6 @@
 #define DW_APB_CURR_VAL		0x4
 #define DW_APB_CTRL		0x8
 
-DECLARE_GLOBAL_DATA_PTR;
-
 struct dw_apb_timer_priv {
 	fdt_addr_t	regs;
 };