Revert "CHROMIUM: ARCVM: config: Enable lazy RCU"

This reverts commit 37a43ee7.

Reason for revert: b:281590239 (Perf regression in ARC ~30%)

Original change's description:
> CHROMIUM: ARCVM: config: Enable lazy RCU
>
> This enables lazy RCU config for power savings.
>
> BUG=b:222463781
> TEST=ARCVM Idle power lab tests.
>
> Signed-off-by: Joel Fernandes <joelaf@google.com>
> Signed-off-by: Parshuram Sangle <parshuram.sangle@intel.corp-partner.google.com>
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/3965650


> Reviewed-by: Ross Zwisler <zwisler@google.com>
> Change-Id: I5569d218d9caecf91686e0f4308c2fa2a721909a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/4069549

Bug: b:222463781
Change-Id: Iad0f3f935a22c730199f32322cc94a2ee589f82d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/4533645


Tested-by: Yury Khmel <khmel@chromium.org>
Reviewed-by: Kazuhiro Inaba <kinaba@chromium.org>
Commit-Queue: Yury Khmel <khmel@chromium.org>
Reviewed-by: Ross Zwisler <zwisler@google.com>