Use new memory layout for pVM firmware.

Moved data memory to just above pVM firmware image, rather than an
arbitrary location higher in RAM.

Bug: 223166344
Test: ran with patched crosvm
Change-Id: I4fc92edf7752352bc962169b009d052ddd07479d
diff --git a/pvmfw/image.ld b/pvmfw/image.ld
index aeb5046..18bb3ba 100644
--- a/pvmfw/image.ld
+++ b/pvmfw/image.ld
@@ -16,7 +16,7 @@
 
 MEMORY
 {
-	image		: ORIGIN = 0x7fe00000, LENGTH = 2M
+	image		: ORIGIN = 0x7fc00000, LENGTH = 2M
+	writable_data	: ORIGIN = 0x7fe00000, LENGTH = 2M
 	dtb_region	: ORIGIN = 0x80000000, LENGTH = 2M
-	writable_data	: ORIGIN = 0x80400000, LENGTH = 2M
 }