Merge changes from topic "marvell-a3k-separate-flash-and-uart" into integration

* changes:
  docs: marvell: Update info about WTMI_IMG option
  plat: marvell: armada: a3k: Remove unused variable WTMI_SYSINIT_IMG from Makefile
  plat: marvell: armada: Show informative build messages and blank lines
  plat: marvell: armada: Move definition of mrvl_flash target to common marvell_common.mk file
  plat: marvell: armada: a3k: Use $(Q) instead of @
  plat: marvell: armada: a3k: Add a new target mrvl_uart which builds UART image
  plat: marvell: armada: a3k: Build UART image files directly in $(BUILD_UART) subdirectory
  plat: marvell: armada: a3k: Build intermediate files in $(BUILD_PLAT) directory
  plat: marvell: armada: a3k: Correctly set DDR_TOPOLOGY and CLOCKSPRESET for WTMI
  plat: marvell: armada: a3k: Allow use of the system Crypto++ library
  docs: marvell: Update info about WTP and MV_DDR_PATH parameters
  plat: marvell: armada: a3k: Add checks that WTP, MV_DDR_PATH and CRYPTOPP_PATH are correctly defined
  docs: marvell: Update mv-ddr-marvell and A3700-utils-marvell branches