compat: backport USHRT_MAX, SHRT_MAX and SHRT_MIN

compat: backport USHRT_MAX, SHRT_MAX and SHRT_MIN

This backports this patch:

Author: Alexey Dobriyan <adobriyan@gmail.com>
Date:   Mon May 24 14:33:03 2010 -0700

    kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, SHRT_MAX and SHRT_MIN

    - C99 knows about USHRT_MAX/SHRT_MAX/SHRT_MIN, not
      USHORT_MAX/SHORT_MAX/SHORT_MIN.

    - Make SHRT_MIN of type s16, not int, for consistency.

    [akpm@linux-foundation.org: fix drivers/dma/timb_dma.c]
    [akpm@linux-foundation.org: fix security/keys/keyring.c]
    Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
    Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>