Ensure that the VFAT external reset is applied for long enough
Description
A few days after merging a feature that manually applies the external VFAT reset on ME0 via the LpGBT (see commit 079073d7), we learned that the new ME0 VFAT plugin cards have an RC circuit with a time constants of 10 milliseconds installed on the reset line. We should ensure that the reset pulse is long enough to properly assert and de-assert the external reset -- 50 milliseconds seems like a good baseline.