sparc: Merge asm-sparc{,64}/poll.h

:$ diff -u include/asm-sparc/poll.h include/asm-sparc64/poll.h
:-- include/asm-sparc/poll.h	2008-06-13 06:42:07.000000000 +0200
:++ include/asm-sparc64/poll.h	2008-06-13 06:42:07.000000000 +0200
:@@ -1,5 +1,5 @@
:-#ifndef __SPARC_POLL_H
:-#define __SPARC_POLL_H
:+#ifndef __SPARC64_POLL_H
:+#define __SPARC64_POLL_H
:
: #define POLLWRNORM	POLLOUT
: #define POLLWRBAND	256

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>