MAINTAINERS: Add Karthikeyan Mitran and Hou Zhiqiang for Mobiveil PCI

Add Karthikeyan Mitran and Hou Zhiqiang as new maintainers of Mobiveil
controller driver.

Link: https://lore.kernel.org/linux-pci/1557229516-6870-1-git-send-email-l.subrahmanya@mobiveil.co.in


Signed-off-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
[bhelgaas: update names/email addresses to match usage in git history]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Karthikeyan Mitran <m.karthikeyan@mobiveil.co.in>