Fixes and updates for the Linux compatibility layer:

• Remove unsupported "bus" field from "struct pci_dev".
• Fix logic inside "pci_enable_msix()" when the number of allocated interrupts are less than the number of available interrupts.
• Update header files included from "list.h".
• Ensure that "idr_destroy()" removes all entries before destroying the IDR root node(s).
• Set the "device->release" function so that we don't leak memory at device destruction.
• Use FreeBSD's "log()" function for certain debug printouts.
• Put parenthesis around arguments inside the min, max, min_t and max_t macros.
• Make sure we don't leak file descriptors by dropping the extra file reference counts done by the FreeBSD kernel when calling falloc() and fget_unlocked().

MFC after: 1 week
Sponsored by: Mellanox Technologies