msm: mdm: make the mdm driver common between sglte and mdm

The mdm driver is made common between the sglte and mdm
modem by harmonizing the gpio names with logical
functionality and adding flags in case of differences.
The AP2MDM_PMIC_RESET_N gpio is renamed to AP2MDM_SOFT_RESET.
The early_power_on and sfr_query flags are added.

Change-Id: I9a5f8b208979ac7cbd01141f7518f99b0b0fec68
Signed-off-by: Joel King <joelking@codeaurora.org>