ARM: dts: imx6qdl: Fix typo in imx6qdl-icore-rqs.dtsi

This patch fixes a spelling typo.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Fixes: cc42603d

 ("ARM: dts: imx6q-icore-rqs: Add Engicam IMX6 Q7 initial support")
Signed-off-by: Shawn Guo <shawnguo@kernel.org>