Error handling fixes:
1. In the case of kzalloc failure, simple return -ENOMEM instead of goto
   err. ( priv is NULL in this case )
2. In the case of gpio_request fail for reset_gpio and data_enable_gpio,
   properly release resources by goto err and err2 respectively.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NAlberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>