bsps/versal: Support a 64bit RAM base

Set the constraint to be 64bits to allow the complete address range.

spec/build/bsps/aarch64/xilinx-versal/optramlen.yml

@@ -1,7 +1,7 @@
 SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
 actions:
 - get-integer: null
-- assert-uint32: null
+- assert-uint64: null
 - env-assign: null
 - format-and-define: null
 build-type: option