linux-gbmc: Fix 32MB flash layout

The hoth mailbox got incorrectly changed in offset and is fixed by this
change.

Tested: Ran on the GPU platform that is using the fixed version of this
layout and verified that the hoth mailbox is functioning correctly now.

Google-Bug-Id: 358370005
Change-Id: Ice16ab709e9f9b7cec005d21c2dd7c19081617f6
Signed-off-by: William A. Kennington III <wak@google.com>
(cherry picked from commit 8f53e21de451ae72c9898c4177a86b6195870b7b)
diff --git a/recipes-kernel/linux/files/linux-gbmc/arch/arm/boot/dts/gbmc-flash-layout-32.dtsi b/recipes-kernel/linux/files/linux-gbmc/arch/arm/boot/dts/gbmc-flash-layout-32.dtsi
index c403b94..181555d 100644
--- a/recipes-kernel/linux/files/linux-gbmc/arch/arm/boot/dts/gbmc-flash-layout-32.dtsi
+++ b/recipes-kernel/linux/files/linux-gbmc/arch/arm/boot/dts/gbmc-flash-layout-32.dtsi
@@ -24,7 +24,7 @@
 	};
 	hoth-mailbox@4 {
 		label = "hoth-mailbox";
-		reg = <0x710000 0x10000>;
+		reg = <0x700000 0x10000>;
 	};
 	rwfs@5 {
 		label = "rwfs";