[RCAR] Fix sound on ulcb board

[RCAR] Fix sound on ulcb board

After RCAR BSP 4.7.0, m3ulcb and h3ulcb (without kingfisher layer) does not have audio after BSP Update.
The sound car is named ak4613 now for booth ulcb card and ulcb +kf
card.(no rcarsound name anymore)

Bug-AGL: SPEC-3849

Signed-off-by: Ronan Le Martret <ronan.lemartret@iot.bzh>
Change-Id: Id759de2a0df90cd216106da54870f663ca7adb64
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/26189
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>