sched/vtime: Do not include <asm/vtime.h> header

There is no architecture-specific code or data left
that generic <linux/vtime.h> needs to know about.
Thus, avoid the inclusion of <asm/vtime.h> header.

Signed-off-by: Alexander Gordeev <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>
Reviewed-by: Frederic Weisbecker <[e-mail]>
Acked-by: Nicholas Piggin <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/powerpc/include/asm/Kbuild

···
 generic-y += kvm_types.h
 generic-y += mcs_spinlock.h
 generic-y += qrwlock.h
-generic-y += vtime.h
 generic-y += early_ioremap.h

include/asm-generic/vtime.h

···
-/* no content, but patch(1) dislikes empty files */

include/linux/vtime.h

···
 #include <linux/context_tracking_state.h>
 #include <linux/sched.h>
 
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
-#include <asm/vtime.h>
-#endif
-
 /*
  * Common vtime APIs
  */