asus_acpi: fix coding style to improve readability

In the case of no match ( hotk->model == END_MODEL ), the only posible
case to return 0 is to have a Samsung P30 detected.  This patch improves
readability by moving related code after if/else clause to be inside if
clause.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Karol Kozimor <sziwan@users.sourceforge.net>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Len Brown <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Matthew Garrett <mjg@redhat.com>