tests: Enable kernel.device tests for qemu_x86_64

Reworked platform_whitelist to enable the "test kernel.device" for
qemu_x86_64

kernel.device.pm is not yet enabled for qemu_x86_64 because
there is a link error

   undefined symbol `_DEVICE_STRUCT_SIZEOF'
   referenced in expression

Signed-off-by: Cinly Ooi <cinly.ooi@intel.com>
1 file changed