Remove device-specific rtc labeling.

rtc0 should be labeled rtc_device rather than just rtc. It should also be
labeled for all devices rather than on a per-device basis.  Remove this labeling
in preparation for global policy.

(Cherry-pick of commit: 60f466f4edac8c8ef2e7e800d4ef9b482ed467f6)

Change-Id: I8b5795cb4739bb7fb6b2673d0b1b12be40db7a7f
4 files changed