x86, x32: Use __kernel_long_t for __statfs_word

x32 statfs system call is the same as x86-64 statfs system call, which
uses 64-bit integer for __statfs_word. This patch defines __statfs_word
as __kernel_long_t instead of long.

Signed-off-by: H.J. Lu <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Cc: Arnd Bergmann <[e-mail]>
Signed-off-by: H. Peter Anvin <[e-mail]>

include/uapi/asm-generic/statfs.h

···
  */
 #ifndef __statfs_word
 #if __BITS_PER_LONG == 64
-#define __statfs_word long
+#define __statfs_word __kernel_long_t
 #else
 #define __statfs_word __u32
 #endif