ALSA/ASoC/SoundWire: Intel: update maximum number

Merge series from Bard Liao <yung-chuan.liao@linux.intel.com>:

Intel new platforms can have up to 5 SoundWire links.
This series does not apply to SoundWire tree due to recent changes in
machine driver. Can we go via ASoC tree with Vinod's Acked-by tag?