stable inclusion
from stable-v5.10.121
commit 6b45437959dcfa177df32ac63318d3e1d7377523
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6CQ

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6b45437959dcfa177df32ac63318d3e1d7377523

--------------------------------

commit cf936af7 upstream.

Implement fb_is_primary_device() function, so that fbcon detects if this
framebuffer belongs to the default graphics card which was used to start
the system.
Signed-off-by: NHelge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v5.10+
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>