MAINTAINERS: Add Nirmal Patel as VMD maintainer

Change my email to my unaffiliated address and move me to reviewer status.

Link: https://lore.kernel.org/r/20210909200221.29981-1-jonathan.derrick@intel.com


Signed-off-by: Jon Derrick <jonathan.derrick@linux.dev>
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Nirmal Patel <nirmal.patel@linux.intel.com>