staging: tidspbridge: remove RET_OK RET_FAIL

RET_OK is 0 and RET_FAIL is a -1, replace these custom returns with
a standard errno

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>
2 files changed