x86/percpu: Clean up <asm/percpu.h> vertical alignment details

 - Fix/unify misc vertical alignment inconsistencies

 - Make CPP macros look a bit more like C code by adding
   an empty line after local variable declaration blocks,
   and before final rvalue statements.

No change in code.

Signed-off-by: Ingo Molnar <[email protected]>
Cc: Uros Bizjak <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: [email protected]

Author: Ingo Molnar