powerpc/configs/64s: Enable SCHEDSTATS

Distros enable it.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-21-mpe@ellerman.id.au

arch/powerpc/configs/ppc64_defconfig

@@ -407,6 +407,7 @@ CONFIG_DEBUG_VM=y
 CONFIG_DEBUG_STACKOVERFLOW=y
 CONFIG_SOFTLOCKUP_DETECTOR=y
 CONFIG_HARDLOCKUP_DETECTOR=y
+CONFIG_SCHEDSTATS=y
 CONFIG_DEBUG_MUTEXES=y
 CONFIG_FUNCTION_TRACER=y
 CONFIG_LOCK_TORTURE_TEST=m