Commit
198e56957b2057a496e8705ab2b132f40df8bbb8
by tonyDetach kernel serial console for PM
Detach of kernel serial console needed starting with v5.7-rc1.
See kernel commit a3cb39d258ef ("serial: core: Allow detach and
attach serial device for console") fore more detail.
Signed-off-by: Tony Lindgren <tony@atomide.com>