MFC r307804-r307805

r307804:
EVDEV: Add shortcut functions for event types

Add wrappers around generic evdev_push_event for specific event types:
EV_KEY/EV_REL/EV_ABS etc...

Submitted by: Vladimir Kondratiev <wulf@cicgroup.ru>

r307805:
EVDEV: ums evdev support improvements: locking and event reporting

• Use ums lock as evdev lock
• Do not cap axes values to sysmouse limits for evdev reports
• Do not map T-axis events to buttons for evdev reports
• Use shortcuts for event reporting

Submitted by: Vladimir Kondratiev <wulf@cicgroup.ru>
MFC after: 1 week