ARM: dts: qcom: Add extcon phandle to ChipIdea driver

Update ChipIdea USB OTG device tree node to detect external
connector cable as USB device or host and configure the USB
mode as pheripheral or host.

Change-Id: I597c70f5a99cdbe3f566dcf092806cd96387bc8f
Signed-off-by: Sudharsan Reddy Yettapu <syepattu@codeaurora.org>
Signed-off-by: Suresh Kumar Allam <allamsuresh@codeaurora.org>
Signed-off-by: Sivasri Kumar Vanka <sivasri@codeaurora.org>