gps_mem is needed by the modem firmware for GPS to work. However, it is
accessed via QMI memshare [1] which is not available upstream yet.
Until it lands upstream reserving this does not provide any advantage.

[1]: https://lore.kernel.org/linux-arm-msm/20210319172321.22248-1-nikitos.tr@gmail.com/Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Link: https://lore.kernel.org/r/20230911-msm8916-rmem-v1-3-b7089ec3e3a1@gerhold.netSigned-off-by: Bjorn Andersson <andersson@kernel.org>