ARM: dts: aspeed: rainier: Remove gpio hog for GPIOP7

Only the pass 1 Ingraham board (Rainier system) had a micro-controller
wired to GPIOP7 on ball Y23. Pass 2 boards have this ball wired to the
heartbeat LED, so remove the hog as this device tree supports pass 2.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20210915214738.34382-5-eajames@linux.ibm.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts

@@ -297,13 +297,6 @@ &gpio0 {
 	/*Y0-Y7*/	"","","","","","","","",
 	/*Z0-Z7*/	"","","","","","","","";
 
-	pin_mclr_vpp {
-		gpio-hog;
-		gpios = <ASPEED_GPIO(P, 7) GPIO_OPEN_DRAIN>;
-		output-high;
-		line-name = "mclr_vpp";
-	};
-
 	i2c3_mux_oe_n {
 		gpio-hog;
 		gpios = <ASPEED_GPIO(G, 6) GPIO_ACTIVE_LOW>;