console: Set console device counter in console_devices_set()

console_devices_set() missed the console device counter to be set correctly.

Fixes: 45375adc ("console: add function console_devices_set")
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>