marked semihosting_halt function unsafe

[kitcatier]

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• Fixed all cargo clippy warnings.
• Applied rustfmt.
  

  kerla/runtime/x64/semihosting.rs

  Lines 10 to 14 in e1ddf73

  	pub fn semihosting_halt(status: SemihostingExitStatus) {
  	unsafe {
  	outw(0x501, status as u16);
  	}
  	}

  
  hello, if a function's entire body is unsafe, the function is itself unsafe and should be marked appropriately. Marking them unsafe also means that callers must make sure they know what they're doing.

[nuta]

Thanks! Left a suggestion.

[nuta]

nit:

Suggested change

	pub unsafe fn semihosting_halt(status: SemihostingExitStatus) {
	unsafe {
	outw(0x501, status as u16);
	}
	pub unsafe fn semihosting_halt(status: SemihostingExitStatus) {
	outw(0x501, status as u16);