[PATCH] uml: include tidying

In order to get the __NR_* constants, we need sys/syscall.h.
linux/unistd.h works as well since it includes syscall.h, however syscall.h
is more parsimonious. We were inconsistent in this, and this patch adds
syscall.h includes where necessary and removes linux/unistd.h includes
where they are not needed.

asm/unistd.h also includes the __NR_* constants, but these are not the
glibc-sanctioned ones, so this also removes one such inclusion.

Signed-off-by: Jeff Dike <[e-mail]>
Cc: Paolo 'Blaisorblade' Giarrusso <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/um/os-Linux/process.c

···
 #include <stdio.h>
 #include <errno.h>
 #include <signal.h>
-#include <linux/unistd.h>
 #include <sys/mman.h>
 #include <sys/wait.h>
 #include <sys/mman.h>

arch/um/os-Linux/skas/process.c

···
 #include <sys/mman.h>
 #include <sys/user.h>
 #include <sys/time.h>
-#include <asm/unistd.h>
+#include <sys/syscall.h>
 #include <asm/types.h>
 #include "user.h"
 #include "sysdep/ptrace.h"

arch/um/os-Linux/tls.c

···
 #include <errno.h>
+#include <unistd.h>
 #include <sys/ptrace.h>
 #include <sys/syscall.h>
-#include <unistd.h>
 #include <asm/ldt.h>
 #include "sysdep/tls.h"
 #include "uml-config.h"