linux-gbmc: enable cdc_ncm We will have use cases to pass host mac address in usbnet. cdc_eem does not support that and we need to use cdc_ncm. Tested: verified that the MAC is set correctly Fusion-Link: https://fusion2.corp.google.com/ci/guitar/projects/null/activity/fbdf53e5-5af4-416d-b13c-7d532c1b50bf/overview Google-Bug-Id: 392923910 Change-Id: Ie3ea6a205fbb64b3a0d903ce5934304dd18caa49 Signed-off-by: Yuxiao Zhang <yuxiaozhang@google.com>