dt-bindings: soc: imx8m-blk-ctrl: Rename blk_ctrl to blk-ctrl in examples

Rename blk_ctrl@ to blk-ctrl (with dash instead of underscore) in examples
so that they would match the imx8m[mn].dtsi in current Linux kernel.

Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: Marek Vasut

Documentation/devicetree/bindings/soc/imx/fsl,imx8mm-disp-blk-ctrl.yaml

@@ -70,7 +70,7 @@ examples:
     #include <dt-bindings/clock/imx8mm-clock.h>
     #include <dt-bindings/power/imx8mm-power.h>
 
-    disp_blk_ctl: blk_ctrl@32e28000 {
+    disp_blk_ctl: blk-ctrl@32e28000 {
       compatible = "fsl,imx8mm-disp-blk-ctrl", "syscon";
       reg = <0x32e28000 0x100>;
       power-domains = <&pgc_dispmix>, <&pgc_dispmix>, <&pgc_dispmix>,

Documentation/devicetree/bindings/soc/imx/fsl,imx8mn-disp-blk-ctrl.yaml

@@ -71,7 +71,7 @@ examples:
     #include <dt-bindings/clock/imx8mn-clock.h>
     #include <dt-bindings/power/imx8mn-power.h>
 
-    disp_blk_ctl: blk_ctrl@32e28000 {
+    disp_blk_ctl: blk-ctrl@32e28000 {
       compatible = "fsl,imx8mn-disp-blk-ctrl", "syscon";
       reg = <0x32e28000 0x100>;
       power-domains = <&pgc_dispmix>, <&pgc_dispmix>,