ARM: dts: msm: fix msm8996 pinctrl setting for TSIF sync signal

TSIF mode-2, which uses the 'sync' signal, was not working due
to 'sync' signal not being pinmuxed for the correct function.
Fixing the sync signals nodes resolved the issue.

Change-Id: I6450543c467fdcf8ef38cd2e82db193bd8ccd0a4
Signed-off-by: Gilad Broner <gbroner@codeaurora.org>