refactor(corstone700): namespace MHU driver filenames

There are plans to contribute a generic MHU driver to the TF-A code
base in the short term.

In preparation for this, rename the Corstone-700 MH

refactor(corstone700): namespace MHU driver filenames

There are plans to contribute a generic MHU driver to the TF-A code
base in the short term.

In preparation for this, rename the Corstone-700 MHU driver source
files and prefix them with the name of the platform to avoid any
ambiguity or name clashes with the upcoming generic MHU driver. Also
rename the header guard accordingly.

This renaming is inline with other platform-specific MHU drivers, such
as the ones used on Broadcom [1], Socionext [2] or Amlogic [3] platforms.

[1] plat/brcm/common/brcm_mhu.h
[2] plat/socionext/synquacer/drivers/mhu/sq_mhu.h
[3] plat/amlogic/common/aml_mhu.c

Change-Id: I8a5e5b16e7c19bf931a90422dfca8f6a2a0663b4
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>

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corstone700: splitting the platform support into FVP and FPGA

This patch performs the following:

- Creating two corstone700 platforms under corstone700 board:

fvp and fpga

- Since the FVP and F

corstone700: splitting the platform support into FVP and FPGA

This patch performs the following:

- Creating two corstone700 platforms under corstone700 board:

fvp and fpga

- Since the FVP and FPGA have IP differences, this commit provides a specific DTS for each platform
- The platform can be specified using the TARGET_PLATFORM Makefile variable
(possible values are: fvp or fpga)
- Allowing to use u-boot by:
- Enabling NEED_BL33 option
- Fixing non-secure image base: For no preloaded bl33 we want to
have the NS base set on shared ram. Setup a memory map region
for NS in shared map and set the bl33 address in the area.
- Setting the SYS_COUNTER_FREQ_IN_TICKS based on the selected
platform
- Setting ARM_MAP_SHARED_RAM and ARM_MAP_NS_SHARED_RAM to use MT_MEMORY

Change-Id: I4c8ac3387acb1693ab617bcccab00d80e340c163
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>

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