ASoC: dmaengine: Replace strncpy() with strscpy_pad() for pcm->name

While it is safe to use strncpy in this case, the advice is to move to
strscpy or strscpy_pad.

Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190911083331.16801-1-peter.ujfalusi@ti.com


Signed-off-by: Mark Brown <broonie@kernel.org>