Fix build of si with base gcc on i386

Casting from rman_res_t to a pointer results in "cast to pointer from
integer of different size" warnings with base gcc on i386, so use
intermediate casts to uintptr_t to suppress these.

Direct commit to stable/11, since si(4) has been removed from head.

Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D15752

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Migrate many bus_alloc_resource() calls to bus_alloc_resource_anywhere().

Most calls to bus_alloc_resource() use "anywhere" as the range, with a given
count. Migrate these to use the new bus_alloc_resource_anywhere() API.

Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D5370

Catchup with filters

Start each of the license/copyright comments with /*-, minor shuffle of lines

Add missing <sys/module.h> includes

Convert callers to the new bus_alloc_resource_any(9) API.

Submitted by: Mark Santcroos <marks@ripe.net>
Reviewed by: imp, dfr, bde

Use __FBSDID().
Also some minor style cleanups.

Cast a pointer to uintptr_t instead ot u_int.

Do not try and probe random PNP devices, This Is Bad.
Display reasons why probe/attach fails.

A bit more newbusification of si. This still isn't quite finished.
Split out the bus attachments so the impact of the bus xxxvar.h files
with the inline macros for the ivars are confined to one file each.