winejoystick.drv: Add axis remapping support

[Adolfo R. Brandes]

  Greetings!

  The purpose of this patch is to add registry axis remapping and POV
hat support to winejoystick.drv, much like what's already in place for
dinput/joystick_linux.c.  I needed this for X-Wing Alliance
(http://appdb.winehq.org/objectManager.php?sClass=application&iId=2110),
which recognizes my Thrustmaster Top Gun Fox 2 Pro USB joystick, but
not the POV hat and with the Rudder and Throttle axes switched around.

  It uses the following conventions:

HKCU\Software\Wine\Joystick\<joyname> = <axeslist>

or

HKCU\Software\Wine\AppDefaults\app.exe\Joystick\<joyname> = <axeslist>

  Where <joyname> is the device name (as shown in jstest), and
<axeslist> is a comma-separated list of axis names.  However, in
contrast to joystick_linux.c, the axis names are the same as in
jstest.  For example, in my case jstest reports:

Joystick (THRUSTMASTER Top Gun Fox 2  Pro ) has 6 axes (X, Y, Rz,
Throttle, Hat0X, Hat0Y)

  Since I want to change Rz and Throttle around for X-Wing Alliance,
this is what my registry key looks like (notice that you must include
all spaces in the device name):

HKCU\Software\Wine\Joystick\"THRUSTMASTER Top Gun Fox 2  Pro " =
"X,Y,Throttle,Rz,Hat0X,Hat0Y"

  And since I have a Hat* axis, the driver will report to the game
that I have a POV (i.e., JOY_HASPOV).

I hope it helps,
Adolfo R. Brandes
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