Temporarily disable a71ch target

Disable a71ch target until it is updated to the OSS version.
This also prevent the package copied to /opt/aiy/packages in the
released image for now.

Change-Id: I1ee80337518825541c6aaddb6170262dba0a0d2e
diff --git a/packages.mk b/packages.mk
index 999568d..d8d7d04 100644
--- a/packages.mk
+++ b/packages.mk
@@ -36,5 +36,5 @@
 $(eval $(call make-pbuilder-bsp-package-target,optee-os,bootloader/optee-os))
 $(eval $(call make-pbuilder-bsp-package-target,tf-a,bootloader/tf-a))
 $(eval $(call make-pbuilder-bsp-package-target,excelsior-bootloader,packages/excelsior-bootloader,u-boot optee-os tf-a))
-$(eval $(call make-pbuilder-bsp-package-target,a71ch-crypto-support,a71ch-crypto-support,,,binary,$(USERSPACE_ARCH)))
+# $(eval $(call make-pbuilder-bsp-package-target,a71ch-crypto-support,a71ch-crypto-support,,,binary,$(USERSPACE_ARCH)))
 $(eval $(call make-pbuilder-bsp-package-target,excelsior-tools,packages/excelsior-tools))