[PATCH] pinctrl: single: use of_device_get_match_data() to get soc data

* Masahiro Yamada [off-list ref] [170520 09:06]:

Use of_device_get_match_data() instead of of_match_device().
It allows us to remove the forward declaration of pcs_of_match.

That's nice:

Acked-by: Tony Lindgren <tony@atomide.com>