arm64: Do not include asm/unistd32.h in asm/unistd.h

This patch only includes asm/unistd32.h where necessary and removes its
inclusion in the asm/unistd.h file. The __SYSCALL_COMPAT guard is
dropped.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>

arch/arm64/kernel/sys_compat.c

@@ -18,8 +18,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#define __SYSCALL_COMPAT
-
 #include <linux/compat.h>
 #include <linux/personality.h>
 #include <linux/sched.h>
@@ -28,7 +26,7 @@
 #include <linux/uaccess.h>
 
 #include <asm/cacheflush.h>
-#include <asm/unistd.h>
+#include <asm/unistd32.h>
 
 asmlinkage int compat_sys_fork(struct pt_regs *regs)
 {