board: ge: bx50v3: add i2c eeprom bootcount storage

Add bootcount node, linking to i2c eeprom "bootcount" partitions for
storage.
Enable i2c eeprom bootcount backend storage.
Enable bootcount command and use it for failbootcmd.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
diff --git a/arch/arm/dts/imx6q-bx50v3-uboot.dtsi b/arch/arm/dts/imx6q-bx50v3-uboot.dtsi
index 99d409d..77115a7 100644
--- a/arch/arm/dts/imx6q-bx50v3-uboot.dtsi
+++ b/arch/arm/dts/imx6q-bx50v3-uboot.dtsi
@@ -5,6 +5,11 @@
  */
 
 / {
+	bootcount {
+		compatible = "u-boot,bootcount-i2c-eeprom";
+		i2c-eeprom = <&bootcount>;
+	};
+
 	wdt-reboot {
 		compatible = "wdt-reboot";
 		wdt = <&wdog1>;
@@ -20,7 +25,7 @@
 			size = <1022>;
 		};
 
-		bootcount {
+		bootcount: bootcount {
 			offset = <1022>;
 			size = <2>;
 		};