[media] airspy: fix error handling on start streaming

Free all reserved USB buffers and URBs on failure. Return all queued
buffers to vb2 with state queued on error case.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>