Update constants and structs' layouts with reversed ones, fix code using them

[lateleite]

Hey,

Here's what this patch changes:

• Updates structure and constants with their correct/reversed definitions;
• Changes all functions impacted by the previous definitions change;
• Replaces musl's internal wake and wait futex uses with FreeBSD's umtx;
• Disables compilation on some API functions that are implemented by libkernel itself, or that can't be implemented on Orbis OS;
• Fixes some pointer casts that Zig's C compiler complained about.

Sources used:

• FreeBSD 9.00's source code
• Kernel and user libraries dump of the retail firmware version 9.00

I've tested this changes on my PS4 by compiling and running OpenOrbis' graphics and network samples, along with a personal Zig test project.
NOTE: I didn't try rebuilding libc++.
Test environment:

• Clang and LLD version: 22.1.8
• Firmware: retail 9.00

Whether or not this patch gets accepted, I would appreciate if someone could verify if these updated definitions are correct, since I would like to try sending Zig a patch adding PS4 support to their std library and use this as a source of truth.