static_call: Avoid building empty .static_call_sites

Without CONFIG_HAVE_STATIC_CALL_INLINE there's no point in creating
the .static_call_sites section and it's related symbols.
Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: NJosh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154317.223798256@infradead.org

include/asm-generic/vmlinux.lds.h

@@ -404,6 +404,7 @@
 	KEEP(*(__jump_table))						\
 	__stop___jump_table = .;
 
+#ifdef CONFIG_HAVE_STATIC_CALL_INLINE
 #define STATIC_CALL_DATA						\
 	. = ALIGN(8);							\
 	__start_static_call_sites = .;					\
@@ -412,6 +413,9 @@
 	__start_static_call_tramp_key = .;				\
 	KEEP(*(.static_call_tramp_key))					\
 	__stop_static_call_tramp_key = .;
+#else
+#define STATIC_CALL_DATA
+#endif
 
 /*
  * Allow architectures to handle ro_after_init data on their