ARM: dts: msm: Enable FUNC_SEL selection for aux pcm pins on 8994

The active and sleep configuration of the pmx_sec_aux_pcm and
pmx_sec_aux_pcm_din pins are each combined under one pin-func
definition which prevents changeover from spi to general purpose
function during sleep thereby leaking some extra power.
Separate out the sleep and active configurations under their
individual nodes to enable this power saving.

While at it, re-configure the pins to input-enable during sleep
state to attain further power savings.

Change-Id: I60b94311a4f3199abf410fa463904c62bcb3b471
Signed-off-by: Kaushal Kumar <kaushalk@codeaurora.org>