[RCAR] Add missing dependency for board M3+KF

[RCAR] Add missing dependency for board M3+KF

* For the RCAR BSP v5.5.0 we need a yocto layer:
   - poky/meta-yocto-bsp

Bug-AGL: SPEC-4081

Signed-off-by: Ronan Le Martret <ronan.lemartret@iot.bzh>
Change-Id: If5f4701e1bf1973f1f20f47f9496f07024e0f347
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/26825
Reviewed-by: Harunobu Kurokawa <harunobu.kurokawa.dn@renesas.com>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>