kernel/drm: Add missing braces.
Avoiding an infinite loop during P-state adjustment on the HP6715s notebook.

The code is taken from the OpenBSD counterpart to amd0f_set_fidvid.
The infinite loop probably occurs on my HP6715s because the rvo adjustment
doesn't get applied by the hardware when entering the highest P-state
(maybe because of some kind of overvolting protection).
kernel/i386: Apply 94514bea15a0328e256cda414594fe6e631705a5 in i386 too.
getifaddrs.3: Improve markup (.Vt for types and .Fa for struct fields).
getifaddrs.3: Point out that ifa_broadaddr isn't really a struct field.

It's another name for the ifa_dstaddr field to use for the non-P2P case.
Remove it from the struct, though, to not give wrong ideas about the
struct size for example.

Pointed-out-by: marino