drm/xe: Introduce has_device_atomics_on_smem device info

Add has_device_atomics_on_smem to specify that a device
supports device atomics on system memory. Currently XE2
supports this so set this for XE2.

v2: Set has_device_atomics_on_smem for all platform but
    PVC.

Reviewed-by: Oak Zeng <oak.zeng@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240430162529.21588-4-nirmoy.das@intel.com
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>