ARM: dts: imx6: use generic node name for fixed regulator

The device tree specification recommends that generic name should be
used for nodes.  So instead of naming those fixed regulator nodes
arbitrarily, let's use the generic name 'regulator@num' for those nodes.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

diff --cc arch/arm/boot/dts/imx6q-arm2.dts
Simple merge

diff --cc arch/arm/boot/dts/imx6q-sabrelite.dts
Simple merge

diff --cc arch/arm/boot/dts/imx6qdl-sabresd.dtsi
Simple merge

diff --cc arch/arm/boot/dts/imx6qdl-wandboard.dtsi
Simple merge

diff --cc arch/arm/boot/dts/imx6sl-evk.dts
Simple merge