staging: tidspbridge: remove std.h

std.h introduces _TI_ _FLOAT_ _FIXED_ _TARGET_ ARG_TO_INT ARG_TO_PTR
which are no longer being used anywhere. we dont really need the
custom std.h header. remove it from the repo. where we need types,
introduce standard types.h

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>