ARM: dts: am4372: Add emif node

Add node for TI AM4372 EMIF. Without this we get a warning with the
recent commit fabbe6df (ARM: OMAP: AM43xx hwmod: Add data for am43xx
emif hwmod).

Signed-off-by: Dave Gerlach <[e-mail]>
Tested-by: Felipe Balbi <[e-mail]>
Acked-by: Felipe Balbi <[e-mail]>
[[e-mail]: updated comments]
Signed-off-by: Tony Lindgren <[e-mail]>

Documentation/devicetree/bindings/memory-controllers/ti/emif.txt

···
 Required properties:
 - compatible	: Should be of the form "ti,emif-<ip-rev>" where <ip-rev>
   is the IP revision of the specific EMIF instance.
+		  For am437x should be ti,emif-am4372.
 
 - phy-type	: <u32> indicating the DDR phy type. Following are the
   allowed values

arch/arm/boot/dts/am4372.dtsi

···
 			};
 		};
 
+		emif: emif@4c000000 {
+			compatible = "ti,emif-am4372";
+			reg = <0x4c000000 0x1000000>;
+			ti,hwmods = "emif";
+		};
+
 		edma: edma@49000000 {
 			compatible = "ti,edma3";
 			ti,hwmods = "tpcc", "tptc0", "tptc1", "tptc2";