pci_host_generic: Enumerate resource ranges under bootverbose

Previously ranges were only enumerated for the FDT attachment but not
ACPI. This commit moves the enumeration to the shared attach routine
so it is done for both. While here, don't list empty ranges but do
include the resource type for each range.

Reviewed by: andrew
Differential Revision: https://reviews.freebsd.org/D44132

(cherry picked from commit b28670018dbcc7d6ebc0d05584189d6d04aa079f)