x86/alternatives: Introduce 'struct smp_text_poke_array' and move tp_vec and tp_vec_n...

x86/alternatives: Introduce 'struct smp_text_poke_array' and move tp_vec and tp_vec_nr to it

struct text_poke_array is an equivalent structure to these global variables:

	static struct smp_text_poke_loc tp_vec[TP_VEC_MAX];
	static int tp_vec_nr;

Note that we intentionally mirror much of the naming of
'struct text_poke_int3_vec', which will further highlight
the unecessary layering going on in this code, and will
ease its removal.

No change in functionality.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250411054105.2341982-28-mingo@kernel.org