hms: Workaround idle mouse drift in I2C sampling mode.

Many I2C "compatibility" mouse devices found on touchpads continue to
return last report data in sampling mode after touch has been ended.
That

hms: Workaround idle mouse drift in I2C sampling mode.

Many I2C "compatibility" mouse devices found on touchpads continue to
return last report data in sampling mode after touch has been ended.
That results in cursor drift. Filter out such a reports with comparing
content of current report with content of previous one.

Reported by: many
Tested by: omatsuda, gllb (github.com)
Obtained from: sysutils/iichid

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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 mou

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

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