Clean up mips references in the headers.

Test: treehugger
Change-Id: I1997af980b9e46c7c530f9e6cb1aa407b2d63d76
diff --git a/libc/include/sys/vfs.h b/libc/include/sys/vfs.h
index 9237ee6..ad859f0 100644
--- a/libc/include/sys/vfs.h
+++ b/libc/include/sys/vfs.h
@@ -39,7 +39,7 @@
 typedef struct { int __val[2]; } __fsid_t;
 typedef __fsid_t fsid_t;
 
-#if defined(__aarch64__) || defined(__x86_64__)
+#if defined(__LP64__)
 #define __STATFS64_BODY \
   uint64_t f_type; \
   uint64_t f_bsize; \
@@ -54,39 +54,6 @@
   uint64_t f_flags; \
   uint64_t f_spare[4]; \
 
-#elif defined(__mips__) && defined(__LP64__)
-/* 64-bit MIPS. */
-#define __STATFS64_BODY \
-  uint64_t f_type; \
-  uint64_t f_bsize; \
-  uint64_t f_frsize; /* Fragment size - unsupported. */ \
-  uint64_t f_blocks; \
-  uint64_t f_bfree; \
-  uint64_t f_files; \
-  uint64_t f_ffree; \
-  uint64_t f_bavail; \
-  fsid_t f_fsid; \
-  uint64_t f_namelen; \
-  uint64_t f_flags; \
-  uint64_t f_spare[5]; \
-
-#elif defined(__mips__)
-/* 32-bit MIPS (corresponds to the kernel's statfs64 type). */
-#define __STATFS64_BODY \
-  uint32_t f_type; \
-  uint32_t f_bsize; \
-  uint32_t f_frsize; \
-  uint32_t __pad; \
-  uint64_t f_blocks; \
-  uint64_t f_bfree; \
-  uint64_t f_files; \
-  uint64_t f_ffree; \
-  uint64_t f_bavail; \
-  fsid_t f_fsid; \
-  uint32_t f_namelen; \
-  uint32_t f_flags; \
-  uint32_t f_spare[5]; \
-
 #else
 /* 32-bit ARM or x86 (corresponds to the kernel's statfs64 type). */
 #define __STATFS64_BODY \