media: smiapp: Rename register access functions

Rename register access functions by changing smiapp to ccs.

The functions operating on register addresses have "addr" appended to the
name.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>