ARM: dts: imx28-cfa10036: Convert to use label references

These Crystal fontz board files still use node name and unit
address to reference parts from the imx28.dtsi . This causes
a lot of redundancy. So use label references in order to make
it easier to maintain.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Brian Lilly <brian@crystalfontz.com>
Cc: Michal Vokáč <michal.vokac@ysoft.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>