[PATCH resend] fix boot hang with earlyprintk=efi,keep

earlyprintk=efi,keep does not work any more with a warning in mm/early_ioremap.c: WARN_ON(system_state != SYSTEM_BOOTING): Boot just hangs because of the earlyprintk within earlyprintk implementation code. This is caused by a new introduced middle state in below commit: commit 69a78ff226fe

[PATCH resend] fix boot hang with earlyprintk=efi,keep

earlyprintk=efi,keep does not work any more with a warning in mm/early_ioremap.c: WARN_ON(system_state != SYSTEM_BOOTING): Boot just hangs because of the earlyprintk within earlyprintk implementation code. This is caused by a new introduced middle state in below commit: commit 69a78ff226fe