Checking with preprocessor directives doesn't have any effect because
MULT_COUNT is an enum value rather than a macro. Thus, since MULT_COUNT is
undefined from the preprocessor perspective, even if the number of items in
`enum MULT_PORTS` (except MULT_COUNT) was greater than 33, the error wouldn't
be raised.
The calls to task_spawn_cmd, kill_all, and systemreset were wrappers
around the px4_{task_spawn_cmd|kill_all|systemreset} implementations.
Removed the wrappers and changed all calls to the px4_ equivalents.
NuttX specific code was moved into px4_tasks.h
Signed-off-by: Mark Charlebois <charlebm@gmail.com>
