s390: add missing include statements

arch_mmap_rnd, cpu_have_feature, and arch_randomize_brk are all
defined as globally visible variables.
However the files they are defined in do not include the header files
with the declaration. To avoid a possible mismatch add the missing
include statements so we have proper type checking in place.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/process.c

@@ -7,6 +7,7 @@
  *		 Denis Joseph Barrow,
  */
 
+#include <linux/elf-randomize.h>
 #include <linux/compiler.h>
 #include <linux/cpu.h>
 #include <linux/sched.h>

arch/s390/kernel/processor.c

@@ -6,6 +6,7 @@
 #define KMSG_COMPONENT "cpu"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/cpufeature.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/seq_file.h>

arch/s390/mm/mmap.c

@@ -22,6 +22,7 @@
  * Started by Ingo Molnar <mingo@elte.hu>
  */
 
+#include <linux/elf-randomize.h>
 #include <linux/personality.h>
 #include <linux/mm.h>
 #include <linux/mman.h>