ARM: architected timers: remove support for non DT platforms

All mainline platforms using the ARM architected timers are DT
only. As such, remove the ad-hoc support that is not longer needed
anymore.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h
index 935897f..ed2e95d 100644
--- a/arch/arm/include/asm/arch_timer.h
+++ b/arch/arm/include/asm/arch_timer.h
@@ -1,22 +1,10 @@
 #ifndef __ASMARM_ARCH_TIMER_H
 #define __ASMARM_ARCH_TIMER_H
 
-#include <linux/ioport.h>
-
-struct arch_timer {
-	struct resource	res[2];
-};
-
 #ifdef CONFIG_ARM_ARCH_TIMER
-int arch_timer_register(struct arch_timer *);
-int arch_timer_sched_clock_init(void);
 int arch_timer_of_register(void);
+int arch_timer_sched_clock_init(void);
 #else
-static inline int arch_timer_register(struct arch_timer *at)
-{
-	return -ENXIO;
-}
-
 static inline int arch_timer_of_register(void)
 {
 	return -ENXIO;