plat/rockchip: Use new bl31_params_parse_helper() ...

The Rockchip platform is a prime candidate for switching to the new
bl31_params_parse_helper(), so switch it over. This will allow BL2
implementations on this platform to transparently switch over to the
version 2 parameter structure.

Change-Id: I540741d2425c93f66c8697ce749a351eb2b3a7e8
Signed-off-by: Julius Werner <jwerner@chromium.org>

plat/rockchip: Switch to use new common BL aux parameter library ...

This patch changes all Rockchip platforms to use the new common BL aux
parameter helpers. Since the parameter space is now cleanly split in
generic and vendor-specific parameters and the COREBOOT_TABLE
parameter is now generic, the parameter type number for that parameter
has to change. Since it only affects coreboot which always builds TF as
a submodule and includes its headers directly to get these constants,
this should not cause any issues. In general, after this point, we
should avoid changing already assigned parameter type numbers whenever
possible.

Change-Id: Ic99ddd1e91ff5e5fe212fa30c793a0b8394c9dad
Signed-off-by: Julius Werner <jwerner@chromium.org>

rockchip: Allow console device to be set by DTB. ...

Currently the compile-time constant PLAT_RK_UART_BASE defines
which UART is used as console device. E.g. on RK3399 it is set
to UART2. That means, that a single bl31 image can not be used
for two boards, which just differ on the UART console.

This patch addresses this limitation by parsing the "stdout-path"
property from the "chosen" node in the DTB. The expected property
string is expected to have the form "serialN:XXX", with
N being either 0, 1, 2, 3 or 4. When the property is found, it will
be used to override PLAT_RK_UART_BASE.

Tested on RK3399-Q7, with a stdout-path of "serial0:115200n8".

Signed-off-by: Christoph Müllner <christophm30@gmail.com>
Change-Id: Iafe1320e77ab006c121f8d52745d54cef68a48c7

rockchip: add common aarch32 support ...

There are a number or ARMv7 Rockchip SoCs that are very similar in their
bringup routines to the existing arm64 SoCs, so there is quite a high
commonality possible here.

Things like virtualization also need psci and hyp-mode and instead of
trying to cram this into bootloaders like u-boot, barebox or coreboot
(all used in the field), re-use the existing infrastructure in TF-A
for this (both Rockchip plat support and armv7 support in general).

So add core support for aarch32 Rockchip SoCs, with actual soc support
following in a separate patch.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Change-Id: I298453985b5d8434934fc0c742fda719e994ba0b