This patch adds pin group for Synchronous Serial Interface 1 (SSI1)
for PCM-038 module and enables this interface. This change do nothing
at the current stage but helps to continue develop sound support.
Signed-off-by: NAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>