ARM: dts: aspeed: bletchley: Cleanup redundant nodes

Cleanup following nodes:

1. Remove redundant i2c1 node.
2. Disable in-chip rtc, use battery-backed external rtc (pcf85263)
   instead.
Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Patrick Williams <patrick@stwcx.xyz>
Link: https://lore.kernel.org/r/20220215163151.32252-11-potin.lai@quantatw.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-bmc-facebook-bletchley.dts

@@ -225,10 +225,6 @@ fixed-link {
 	};
 };
 
-&rtc {
-	status = "okay";
-};
-
 &fmc {
 	status = "okay";
 	flash@0 {
@@ -386,10 +382,6 @@ PDO_VAR(3000, 12000, 3000)
 	};
 };
 
-&i2c1 {
-	status = "okay";
-};
-
 &i2c2 {
 	status = "okay";
 	ina230@45 {
@@ -679,6 +671,7 @@ eeprom@56 {
 	};
 
 	rtc@51 {
+		/* in-chip rtc disabled, use external rtc (battery-backed) */
 		compatible = "nxp,pcf85263";
 		reg = <0x51>;
 	};