x86/jump_label: Move 'inline' keyword placement

Fix gcc warning when -Wextra is used by moving the keyword:

  arch/x86/kernel/jump_label.c:61:1: warning: ‘inline’ is not at \
	  beginning of declaration [-Wold-style-declaration]
   static void inline __jump_label_transform(struct jump_entry *entry,
   ^~~~~~

Reported-by: Zzy Wysm <zzy@zzywysm.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/796d93d2-e73e-3447-44eb-4f89e1b636d9@infradead.org