[PATCH v3 1/4] USB: serial: cp210x: New register access functions.

cp210x_get_config and cp210x_set_config are cumbersome to use. This change introduces new register access functions to replace them. New functions are not yet called - the switch is done gradually in following changes. Signed-off-by: Konstantin Shkolnyy --- change in v3: Presented new function

[PATCH v3 1/4] USB: serial: cp210x: New register access functions.

cp210x_get_config and cp210x_set_config are cumbersome to use. This change introduces new register access functions to replace them. New functions are not yet called - the switch is done gradually in following changes. Signed-off-by: Konstantin Shkolnyy --- change