msm: ipa: fix the potential heap overflow on wan-driver

Add a check on rmnet_ipa3_set_tether_client_pipe API
to make sure not accessing more than QMI_IPA_MAX_PIPES_V01
entries when user-space module tries to set pipe index
more than QMI_IPA_MAX_PIPES_V01.

Change-Id: I59d39c7e5743dfea17853b6c4709605d4ebae962
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>