x86/ioremap: Correct function name output

Infact, let the compiler enter the function name so that there
are no discrepancies.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1372369996-20556-1-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>