Merge branch 'acpi-scan' into acpi-pm

Conflicts:
	drivers/acpi/scan.c

The conflict is resolved by moving the just introduced
acpi_device_is_first_physical_node() to bus.c and using
the existing acpi_companion_match() from there.

There will be an additional commit to combine the two.

diff --cc drivers/acpi/bus.c
Simple merge

diff --cc drivers/acpi/internal.h
Simple merge

diff --cc drivers/acpi/scan.c
Simple merge