x86/jump_label: Make tp_vec_nr static

Fix sparse warning:

arch/x86/kernel/jump_label.c:106:5: warning:
 symbol 'tp_vec_nr' was not declared. Should it be static?

It's only used in jump_label.c, so make it static.

Fixes: ba54f0c3 ("x86/jump_label: Batch jump label updates")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <bp@alien8.de>
Cc: <hpa@zytor.com>
Cc: <peterz@infradead.org>
Cc: <bristot@redhat.com>
Cc: <namit@vmware.com>
Link: https://lkml.kernel.org/r/20190625034548.26392-1-yuehaibing@huawei.com

arch/x86/kernel/jump_label.c

@@ -103,7 +103,7 @@ void arch_jump_label_transform(struct jump_entry *entry,
 
 #define TP_VEC_MAX (PAGE_SIZE / sizeof(struct text_poke_loc))
 static struct text_poke_loc tp_vec[TP_VEC_MAX];
-int tp_vec_nr = 0;
+static int tp_vec_nr;
 
 bool arch_jump_label_transform_queue(struct jump_entry *entry,
 				     enum jump_label_type type)