dts: arm: nxp: Fix dtc warning from nxp_rt.dtsi

We get warnings from dtc when building any of the NXP i.MX-RT boards of
the form:

	mimxrt1020_evk.dts_compiled: Warning (simple_bus_reg):
	/soc/random@400CC000: simple-bus unit address format
	error, expected "400cc000"

Simple fix to make everything lowercase to have the unit-address and reg
match.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
1 file changed