boot/mv-ddr-marvell: bump version to armada-18.12

Bump version of Marvell DDR training software. This update accompanies
update of the ARM Trusted Firmware used on Marvell A8K platforms.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

boot/mv-ddr-marvell/mv-ddr-marvell.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256 9aaea1f5e8bf3c9d7e735f569d130b5c2ec773c43e0cfabc9b8dee32adbf7e4e mv-ddr-marvell-99d772547314f84921268d57e53d8769197d3e21.tar.gz
+sha256 39dcc8baccb82cbc746d8f82ce7f673e1b1236e8aee0d09e7ab12c27eeb6ecda mv-ddr-marvell-618dadd1491eb2f7b2fd74313c04f7accddae475.tar.gz

boot/mv-ddr-marvell/mv-ddr-marvell.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-# This is the commit for mv_ddr-armada-18.09.2
-MV_DDR_MARVELL_VERSION = 99d772547314f84921268d57e53d8769197d3e21
+# This is the commit for mv_ddr-armada-18.12.0
+MV_DDR_MARVELL_VERSION = 618dadd1491eb2f7b2fd74313c04f7accddae475
 MV_DDR_MARVELL_SITE = $(call github,MarvellEmbeddedProcessors,mv-ddr-marvell,$(MV_DDR_MARVELL_VERSION))
 MV_DDR_MARVELL_LICENSE = GPL-2.0+ or LGPL-2.1 with freertos-exception-2.0, BSD-3-Clause, Marvell Commercial
 MV_DDR_MARVELL_LICENSE_FILES = ddr3_init.c