AMLCodec: fix ioctl for devices using 3.10 kernel, fix typo

[kszaq]

Description

Fixes building Kodi for Amlogic devices using 3.10 kernel and older amcodec with a bit different IOCTLs.

How Has This Been Tested?

LE master + S805 device.

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the Code guidelines of this project
• My change requires a change to the documentation, either Doxygen or wiki
• I have updated the documentation accordingly
• I have read the CONTRIBUTING document
• I have added tests to cover my change
• All new and existing tests passed

Ping @peak3d and @codesnake

[codesnake]

@kszaq I'm about to PR a cleanup for AML 3D handling.

From my findings AMSTREAM_IOC_GET is always return 0 and is not needed at all. It gets called only for 3D to 2D conversion and should return the same mode set by SetVideo3DMode().

Also SetVideo3DMode() itself can be removed as well, it does nothing in LibreELEC on AML with 3.14 kernel, because CONFIG_POST_PROCESS_MANAGER_3D_PROCESS is not set here.

[kszaq]

Isn't SetVideo3DMode() required for 3.10 devices?

[codesnake]

Yes, ppmgr is used in 3.10 for 3D to 2D conversion, but we can do 3D->2D without ppmgr, the same way as in 3.14.

Just try to disable CONFIG_POST_PROCESS_MANAGER_3D_PROCESS in 3.10 and 3D will still work as intended.

[kszaq]

Understood.

I will leave this PR open for cherry-picking until there's a proper solution/clean-up from you. 👍

[codesnake]

@kszaq I want to test my changes properly before posting a PR. Most likely it will be ready tomorrow. Thanks for your PR anyway!