x86/its: Fix an ifdef typo in its_alloc()

Commit a82b264 ("x86/its: explicitly manage permissions for ITS
pages") reworks its_alloc() and introduces a typo in an ifdef
conditional, referring to CONFIG_MODULE instead of CONFIG_MODULES.

Fix this typo in its_alloc().

Fixes: a82b264 ("x86/its: explicitly manage permissions for ITS pages")
Signed-off-by: Lukas Bulwahn <[email protected]>
Signed-off-by: Dave Hansen <[email protected]>
Link: https://lore.kernel.org/all/20250616100432.22941-1-lukas.bulwahn%40redhat.com

Author: bulwahn

arch/x86/kernel/alternative.c

@@ -228,7 +228,7 @@ static void *its_alloc(void)
 	struct its_array *pages = &its_pages;
 	void *page;
 
-#ifdef CONFIG_MODULE
+#ifdef CONFIG_MODULES
 	if (its_mod)
 		pages = &its_mod->arch.its_pages;
 #endif