arm64: Fix wrong type conversion in writeq_no_log

Current code converts a 64 bit integer to 32 bit in
writeq_relaxed_no_log.  Fix that by change cpu_to_le32()
to cpu_to_le64().

Change-Id: I6ccb4c3dd90d7d1c786daec746cd6974f2e42d7c
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>