aarch64: Add back non-temporal load/stores from oryon-1's memset

aarch64: Add back non-temporal load/stores from oryon-1's memset

I misunderstood the recommendation from the hardware team about non-temporal
load/stores. It is still recommended to use them in memset for large sizes. It
was not recommended for their use with device memory and memset is already
not valid to be used with device memory.

This reverts commit e6590f0c86632c36c9a784cf96075f4be2e920d2.
Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>