configs/solidrun_macchiatobin_marvell: bump component versions

configs/solidrun_macchiatobin_marvell: bump component versions

Bump Linux to armada-18.09, U-Boot to armada-18.09.1 and ATF to
armada-18.09.4.

Note that we continue to use the Linux 4.4.x kernel provided by
Marvell, and not yet their Marvell 4.14.x version. Indeed Marvell
currently considers its 4.4.x BSP as the feature-complete and stable
one, while 4.14.x is in development/QA and is expected to become the
new default BSP by the end of 2018. So let's stick with 4.4.x for now,
since the aim of this defconfig is to provide the vendor BSP.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>