[RCAR] Fix HDMI display connector exchanging

[RCAR] Fix HDMI display connector exchanging

This patch always keeps SK's HDMI to HDMI-A-1 when using KF.

Normally, when using KF, HDMI-A-2 is assigned to SK's HDMI.
It is a patch that avoids SK's HDMI becoming 2nd HDMI,
and it is a commit that corrects the code for BSP v5.5.0.

Bug-AGL: SPEC-4123

Signed-off-by: Harunobu Kurokawa <harunobu.kurokawa.dn@renesas.com>
Signed-off-by: Ronan Le Martret <ronan.lemartret@iot.bzh>
Change-Id: I68351317861fdeb4668ff5bbae420f6cfa24a3a3
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/26826
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>