soc: qcom: Adjust Kconfig dependency for QCOM_MINIDUMP

In preparation for the removal of the QCOM_DLOAD_MODE config
option, adjust the dependency of the QCOM_MINIDUMP driver,
so that it now depends on the POWER_RESET_QCOM config, instead
of the QCOM_DLOAD_MODE config.

Change-Id: If0a73a78e9f6d5a7baa72bd23c40a7d9dac09997
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>