x86/alternatives: Mark text_poke_loc_init() static

The function is only used in this file so make it static.

 [ bp: Massage. ]
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1583253732-18988-1-git-send-email-hqjagain@gmail.com

arch/x86/kernel/alternative.c

@@ -1167,7 +1167,7 @@ static void text_poke_bp_batch(struct text_poke_loc *tp, unsigned int nr_entries
 		atomic_cond_read_acquire(&desc.refs, !VAL);
 }
 
-void text_poke_loc_init(struct text_poke_loc *tp, void *addr,
+static void text_poke_loc_init(struct text_poke_loc *tp, void *addr,
 			       const void *opcode, size_t len, const void *emulate)
 {
 	struct insn insn;