This patch tries to clarify the functions and variables
around the AP scan bus job. All these variables and
functions start with ap_scan_bus and are declared in
one place now.

No functional changes in this patch - only renaming and
move of code or declarations.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>