powerpc/vdso: Remove timekeeper includes

Since the generic VDSO clock mode storage is used, this header file is
unused and can be removed.

This avoids including a non-VDSO header while building the VDSO,
which can lead to compilation errors.

Also drop the comment which is out of date and in the wrong place.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241010-vdso-generic-arch_update_vsyscall-v1-4-7fe5a3ea4382@linutronix.de

arch/powerpc/include/asm/vdso/vsyscall.h

@@ -4,12 +4,8 @@
 
 #ifndef __ASSEMBLY__
 
-#include <linux/timekeeper_internal.h>
 #include <asm/vdso_datapage.h>
 
-/*
- * Update the vDSO data page to keep in sync with kernel timekeeping.
- */
 static __always_inline
 struct vdso_data *__arch_get_k_vdso_data(void)
 {

arch/powerpc/kernel/time.c

@@ -75,7 +75,6 @@
 /* powerpc clocksource/clockevent code */
 
 #include <linux/clockchips.h>
-#include <linux/timekeeper_internal.h>
 
 static u64 timebase_read(struct clocksource *);
 static struct clocksource clocksource_timebase = {