msm8974: Use CAF RIL variant

 * Required for QCRIL CS release

Change-Id: If32ab99eaebbdf5f315d182444d2e572636e115c
(cherry picked from commit b922a32578dfec202d4ae10d6cbc07fce68962b8)
msm8974: underp variant :(

Change-Id: I7d480f8b4288c87dfb411af7a0f90c5ae8799673
(cherry picked from commit 1cd0c0c3f8495f0d5e8e13bcc094d29027a3c46e)