arm64: defconfig: enable Qualcomm IPA and RMNet modules

Enable building the Qualcomm IPA driver as a kernel module.  To be
useful, the IPA driver also requires RMNet, so enable building that
as a module as well.

Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20200518215455.10095-1-elder@linaro.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>