ARM: dts: imx27-phytec-phycard-s-som: Add NFC node

This patch adds the NFC devicetree node for Phytec PCA100 module.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>