x86: make printk_address available on X86_32

Small fomatting fixes to 64-bit as well, trailing whitespace
and extra semicolon, also move the ifdefs for CONFIG_KALLSYMS
into the function itself.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>