hwmon: (w83627ehf) Make DEVICE_ATTR_RO static

Make DEVICE_ATTR_RO static to fix sparse warning:
warning: symbol 'dev_attr_cpu0_vid' was not declared. Should it be static?

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20210724154817.18796-1-W_Armin@gmx.de


Signed-off-by: Guenter Roeck <linux@roeck-us.net>