nati_x86_64_defconfig: enable CONFIG_RCU_NOCB_CPU_DEFAULT_ALL

NILRT is currently booted with `rcu_nocbs=all` kernel parameter set. Enable
CONFIG_RCU_NOCB_CPU_DEFAULT_ALL which will allow us to remove the boot
option in the future.

Note that it is still possible to override this option using rcu_nocbs or
nohz_full boot parameters.

Signed-off-by: Gratian Crisan <gratian.crisan@ni.com>

Author: gratian

arch/x86/configs/nati_x86_64_defconfig

@@ -11,6 +11,7 @@ CONFIG_BSD_PROCESS_ACCT=y
 CONFIG_BSD_PROCESS_ACCT_V3=y
 CONFIG_RCU_EXPERT=y
 CONFIG_RCU_NOCB_CPU=y
+CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y
 # CONFIG_RCU_NOCB_CPU_CB_BOOST is not set
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y