wil6210: use inline functions for register access

Replace macros like "R", "W", "S", "C", defined multiple times,
with inline functions "wil_[rwsc]".

Use "readl" and "writel" instead of "ioread32" and "iowrite32"
since it is granted that memory transactions are used,
not port ones like IN/OUT

Change-Id: I047eecdbe4766cc66f19d8a445c3fb0ee0a904c7
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: b9eeb512496f1b1b5a6e0748c947277d95003af5
Git-repo: https://github.com/kvalo/ath.git


Signed-off-by: Hamad Kadmany <hkadmany@codeaurora.org>