x86, um: get rid of uml unistd.h

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index 128ee85..c4df705 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -12,6 +12,7 @@
 #include "asm/mman.h"
 #include "asm/uaccess.h"
 #include "asm/unistd.h"
+#include "internal.h"
 
 long sys_fork(void)
 {