configs: add CONFIG_FUNCTION_PROFILER=y

Enable function profiling feature of ftrace.
Signed-off-by: NJeffle Xu <jefflexu@linux.alibaba.com>
Acked-by: NCaspar Zhang <caspar@linux.alibaba.com>

config-4.19.y-x86_64

@@ -4114,7 +4114,7 @@ CONFIG_BPF_EVENTS=y
 CONFIG_PROBE_EVENTS=y
 CONFIG_DYNAMIC_FTRACE=y
 CONFIG_DYNAMIC_FTRACE_WITH_REGS=y
-# CONFIG_FUNCTION_PROFILER is not set
+CONFIG_FUNCTION_PROFILER=y
 # CONFIG_BPF_KPROBE_OVERRIDE is not set
 CONFIG_FTRACE_MCOUNT_RECORD=y
 # CONFIG_FTRACE_STARTUP_TEST is not set

config-4.19.y-x86_64-debug

@@ -4147,7 +4147,7 @@ CONFIG_BPF_EVENTS=y
 CONFIG_PROBE_EVENTS=y
 CONFIG_DYNAMIC_FTRACE=y
 CONFIG_DYNAMIC_FTRACE_WITH_REGS=y
-# CONFIG_FUNCTION_PROFILER is not set
+CONFIG_FUNCTION_PROFILER=y
 # CONFIG_BPF_KPROBE_OVERRIDE is not set
 CONFIG_FTRACE_MCOUNT_RECORD=y
 # CONFIG_FTRACE_STARTUP_TEST is not set