Revert "Correct capitalization of RIL_UNSOl_CDMA_PRL_CHANGE"

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This reverts commit 01de23e2066798f408214a0ec9981ab67be59bf8.

Change-Id: If56042f25644f8ca5e52227116c6a81a19547a9d
Merge "Revert "Correct capitalization of RIL_UNSOl_CDMA_PRL_CHANGE"" into pac-4.4