x86/mm: Remove 'mm' argument from unuse_temporary_mm() again

x86/mm: Remove 'mm' argument from unuse_temporary_mm() again

Now that unuse_temporary_mm() lives in tlb.c it can access
cpu_tlbstate.loaded_mm.

[ mingo: Merged it on top of x86/alternatives ]

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: https://lore.kernel.org/r/20250402094540.3586683-5-mingo@kernel.org