Nucleo-f402re: Add an option to use only a minimal set of joystick buttons.  This eliminates some GPIO conflicts

Nucleo-F4x1RE: Add support for an analog joystick shield.  There are still some ADC issues to be worked through as of the initial commit

Correct spelling:  MOUNTPOINT not MOUNTPOUNT.  Numerous places.  Some are problems.  From Woohan Lee

Add support for a variadic ioctl() function.  The ioctl() interface is a non-standard, Unix interface.  NuttX has always used the older, three-parameter version.  Most contemporary systems now, however, use a variadic form of the ioctl() function.  Added an option to insert a shim layer to adapt the three-parameter ioctl() to use the variadic interface form.  Internally, the ioctl handling is the same three-parameter logic.  The only real complexity to the shim is in how the system calls must be handled.

Add an analog joystick driver.  Initial checkin is only a little more of a clone of the discrete joystick driver and is as-of-yet untested