samsung: libril: some code cleanup

Change-Id: Ie79369fce7d6c8832c3256c402a485090c177e61
samsung: Remove multiple inclusion of RIL

Change-Id: I2fee28ca533b9c0923d6bc9d736cf2f2284190e0
samsung: ril: fix inclusion of secril-client

Change-Id: I1266a59d88811fe0b3188dc63b83bace40f54398