Removal of deprecated interfaces

[soby-mathew]

We are planning to remove support for deprecated platform interfaces from TF-A codebase and make a release in the coming months. This will help to sanitize the code and shed some of the baggage we are carrying to maintain compatibility (See here for an example).

This is an early heads-up and for most deprecated interfaces, replacing them with the non-deprecated ones should be straightforward. The deprecated interfaces can be flagged up by setting ERROR_DEPRECATED build flag to 1.

Comments welcome.

[ghost]

I've examined all platforms. At least, the following changes are needed:

HiKey (hikey, hikey960), @hzhuang1:

• Migrate from legacy GIC driver.

i.MX 8, @Anson-Huang:

• Migrate from legacy GIC driver.

Layerscape, @qoriq-open-source:

• Migrate from legacy GIC driver.

Marvell, @kostapr: (done in ARM-software/arm-trusted-firmware#1531)

• Replace bl31_early_platform_setup by bl31_early_platform_setup2.
• Replace bl2_early_platform_setup by bl2_early_platform_setup2.

MediaTek, @mtk09422:

• Migrate from legacy GIC driver.
• Stop using ENABLE_PLAT_COMPAT=1.

NVidia, @vwadekar:

• Migrate from legacy GIC driver.
• Also, update documentation to reflect that t186 is a supported SoC.

QEMU, @jenswi-linaro: (done in ARM-software/arm-trusted-firmware#1558)

• Replace bl31_early_platform_setup by bl31_early_platform_setup2.
• Replace bl2_early_platform_setup by bl2_early_platform_setup2.

RockChip, @TonyXie06, @rockchip-linux:

• Migrate from legacy GIC driver.

Raspberry Pi 3: (done in ARM-software/arm-trusted-firmware#1530)

• I'm taking care of the changes myself.

[ghost]

I've done the migration for the Raspberry Pi 3 here: ARM-software/arm-trusted-firmware#1530

[soby-mathew]

The porting guide/firmware design documentation needs to be updated for blx_early_platform_setup2 APIs. This will be done internally and pushed out soon.

[soby-mathew]

Please note that regarding the MULTI_CONSOLE_API, although the old console API is marked out as deprecated, we will not remove it for the upcoming release.

[ghost]

This PR is the one that removes the deprecated interfaces: ARM-software/arm-trusted-firmware#1587

[soby-mathew]

closed via ARM-software/arm-trusted-firmware#1587

[ghost]

I've created two issues to track the remaining platforms: #633 #634