ARM: dts: msm: fix NFC device probe issue for sdm660

Fixed NFC device probing issue by updating device tree nodes
for sdm660 target by removing clk-src from the node.

Change-Id: I6f564236af25bab86112047dfaf912db1ba2474c
Signed-off-by: Asha Magadi Venkateshamurthy <amagad@codeaurora.org>