powerpc: Only support DYNAMIC_FTRACE not static

We've had dynamic ftrace support for over 9 years since Steve first
wrote it, all the distros use dynamic, and static is basically
untested these days, so drop support for static ftrace.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/ftrace.h

@@ -48,7 +48,6 @@
 #else /* !__ASSEMBLY__ */
 extern void _mcount(void);
 
-#ifdef CONFIG_DYNAMIC_FTRACE
 static inline unsigned long ftrace_call_adjust(unsigned long addr)
 {
        /* reloction of mcount call site is the same as the address */
@@ -58,13 +57,12 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr)
 struct dyn_arch_ftrace {
 	struct module *mod;
 };
-#endif /*  CONFIG_DYNAMIC_FTRACE */
 #endif /* __ASSEMBLY__ */
 
 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
 #define ARCH_SUPPORTS_FTRACE_OPS 1
 #endif
-#endif
+#endif /* CONFIG_FUNCTION_TRACER */
 
 #ifndef __ASSEMBLY__
 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(PPC64_ELF_ABI_v1)