futex: Make function kernel-doc commentary consistent
futex: Make function kernel-doc commentary consistent

Make the existing function kernel-doc consistent throughout
futex.c, following Documentation/kernel-doc-nano-howto.txt as
closely as possible.

When unsure, at least be consistent within futex.c.

Signed-off-by: Darren Hart <6620bce6bfb8b2ba8b188f43804848d35a9a4d76@us.ibm.com>
Acked-by: Peter Zijlstra <3fddac958924aef220f202ca567388ddab3f14a8@infradead.org>
Cc: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>
Cc: Eric Dumazet <a0baddf32b28d2f9429941ed4af2fe636e210591@gmail.com>
Cc: Dinakar Guniguntala <4e2df5029224b0cc861d4c3a65c813963297b174@in.ibm.com>
Cc: John Stultz <2dbbc9a029f6af74f2c2786ce8fa25d932fcaf8c@us.ibm.com>
LKML-Reference: <c005e431a37afe87e0d939dd25838318917708c0@Aeon>
Signed-off-by: Ingo Molnar <9dbbbf0688fedc85ad4da37637f1a64b8c718ee2@elte.hu>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs