[PATCH] PA-RISC copy/clear_user_page improvements

 - Performance improvement to __clear_user_page_asm
 - White space cleanup
 - 64-bit version of copy_user_page_asm
 - Add prefetching to copy_user_page_asm
 - remove NOP and "bundle" comments

Contributions from Joel Soete
Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>