linux-phytec-fsl

MLK-12263 ARM: imx: disable arm_arch_timer for i.MX7D nosmp

When SMP is deselected, ARM_ARCH_TIMER is still enabled while
broadcast time is disabled, so when system enters WAIT mode,
ARM platform's clock will be disabled, then system tick timer
will stop and cause system stay at WAIT mode and timer event
will NOT come as expected.

To fix this issue, we do runtime check in kernel boot up,
if SMP is NOT enabled, ARM_ARCH_TIMER will be disabled and
using GPT timer always.

we have to put this check in early stage before common
arm_arch_timer driver probed.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>