refactor(smp): 将smp模块的系统调用适配syscall table

[fslongjin]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors the SMP module's system call to adapt to the syscall table architecture. The main change is migrating the sched_getaffinity system call from the old monolithic syscall handler to a new modular syscall table structure.

• Removed inline SYS_SCHED_GETAFFINITY handling from the main syscall dispatcher
• Created a new dedicated syscall handler struct implementing the Syscall trait
• Added proper bounds checking to prevent buffer overflow

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
kernel/src/syscall/mod.rs	Removed inline SYS_SCHED_GETAFFINITY handling from the main syscall match statement
kernel/src/smp/syscall/sys_sched_getaffinity.rs	Added new modular syscall handler implementing the Syscall trait with proper bounds checking
kernel/src/smp/syscall/mod.rs	Added module declaration for the new syscall handler
kernel/src/smp/syscall.rs	Removed old implementation that lacked bounds checking

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