arm, arm64: Enable kernel config options required for EAS testing

arm and arm64:

  Add    Function, Function Graph, Irqsoff, Preempt, Sched Tracer
  Add    Prove Locking
  Add    Prove RCU

for arm64:

  Add    USB Net RTL8152
  Add    USB Net
  Add    USB Net AX8817X
  Remove Mouse PS2

for arm:

  Add    kernel .config support and /proc/config.gz
  Add    ARM Big.Little cpufreq driver
  Add    ARM Big.Little cpuidle driver
  Add    Sensor Vexpress
  Remove MXC Arch (build error in 20181026 (tip/sched/core)
  Remove Harden Branch Predictor (spectre-v2 in big.LITTLE not supported)

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>