ARM: dts: msm: add sound node for SKUK

pinctrl names and msm-ext-pa property have been changed
in machine driver.Update them in 8939 MTP and CDP dts
accordingly.

add sound node for 8939 SKUK.

CRs-Fixed: 676373
Change-Id: If0451066cf8946771ac697a2797ee531389bdbc5
Signed-off-by: Meng Wang <mwang@codeaurora.org>