Make mips/mips64 syscall stubs more like the other architectures.

Change-Id: I55f8c1a95f643a6e484f12fbcc25e2c77e55b6b8
diff --git a/libc/arch-mips64/syscalls/mmap.S b/libc/arch-mips64/syscalls/mmap.S
index 682058e..ba6d4fa 100644
--- a/libc/arch-mips64/syscalls/mmap.S
+++ b/libc/arch-mips64/syscalls/mmap.S
@@ -1,14 +1,8 @@
 /* Generated by gensyscalls.py. Do not edit. */
 
-#include <asm/unistd.h>
-#include <machine/asm.h>
-#include <machine/regdef.h>
-    .text
-    .globl mmap
-    .align 4
-    .ent mmap
+#include <private/bionic_asm.h>
 
-mmap:
+ENTRY(mmap)
     .set push
     .set noreorder
     li v0, __NR_mmap
@@ -28,7 +22,7 @@
     j t9
     move ra, t0
     .set pop
-    .end mmap
+END(mmap)
 
     .globl mmap64
     .equ mmap64, mmap