platform/chrome: Enable Chrome platforms on 64-bit ARM

With Chrome running on 64-bit ARM devices, add ARM64 to the list of
supported architectures.
Signed-off-by: NThierry Reding <treding@nvidia.com>
[olof; Fixed up due to addition of COMPILE_TEST]
Signed-off-by: NOlof Johansson <olof@lixom.net>

drivers/platform/chrome/Kconfig

@@ -4,7 +4,7 @@
 
 menuconfig CHROME_PLATFORMS
 	bool "Platform support for Chrome hardware"
-	depends on X86 || ARM || COMPILE_TEST
+	depends on X86 || ARM || ARM64 || COMPILE_TEST
 	---help---
 	  Say Y here to get to see options for platform support for
 	  various Chromebooks and Chromeboxes. This option alone does