net: stmmac: dwmac-qcom-ethqos: add a newline between headers

Typically we use a newline between global and local headers so add it
here as well.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>