sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

hid: add opt_hid.h to modules that use HID_DEBUG

Submitted by: Greg V <greg_AT_unrelenting_DOT_technology>
Reviewed by: imp, wulf
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D28995

hid: Import hidmap and bunch of drivers based on it

hidmap is a kernel module that maps HID input usages to evdev events.

Following dependent drivers is included in the commit:

hms - HID mouse driver.
hcons - Consumer page AKA Multimedia keys driver.
hsctrl - System Controls page (Power/Sleep keys) driver.
ps4dshock - Sony DualShock 4 gamepad driver.

Reviewed by: hselasky
Differential revision: https://reviews.freebsd.org/D27993