cnss2: msm: Enable WLAN over PCIe for GVM

The hypervisor does not support PCI_MSM, and uses PCI_HOST_GENERIC
instead.  After this change, the cnss2/PCIe for WLAN in metal case
depends on PCI_MSM, while in GVM case depends on PCI_HOST_GENERIC.

Currently, the WLAN chip is powered up by hypervisor.  So, just
bypass power related code.

Change-Id: Icf13fb11c5e18f6e48746fe82f1b4392559dd5b0
Signed-off-by: Ferry Zhou <tianguiz@codeaurora.org>