sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>

Update code that relied on sched.h including various MM types for them.

This will allow us to remove the <linux/mm_types.h> include from <linux/sched.h>.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/alpha/include/asm/a.out-core.h

@@ -15,6 +15,7 @@
 #ifdef __KERNEL__
 
 #include <linux/user.h>
+#include <linux/mm_types.h>
 
 /*
  * Fill in the user structure for an ECOFF core dump.

arch/alpha/include/asm/mmu_context.h

@@ -7,6 +7,8 @@
  * Copyright (C) 1996, Linus Torvalds
  */
 
+#include <linux/mm_types.h>
+
 #include <asm/machvec.h>
 #include <asm/compiler.h>
 #include <asm-generic/mm_hooks.h>