regulator: as3722: sd1 external control only during suspend

regulator: as3722: sd1 external control only during suspend

If SD1 external control is enabled from boot, it has adverse
effect on power down cycle. Which can lead to long term product
stability. So enable SD1 external control only while going to
to suspend and disable while resuming

Bug 1495458

Change-Id: Ia65bf6f358d15604cea3914914188ce1725b4120
Signed-off-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-on: http://git-master/r/395039
GVS: Gerrit_Virtual_Submit
Reviewed-by: Matthew Pedro <mapedro@nvidia.com>