MAINTAINERS: Vaibhav Gupta is the new ipack maintainer

MAINTAINERS: Vaibhav Gupta is the new ipack maintainer

I have no longer access to the HW, nor time to properly maintain it.

Adding Vaibhav as maintainer as he currently has access to the HW, he
is working at CERN (user of these drivers) and he is maintaining them
internally there.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Acked-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Link: https://lore.kernel.org/r/20230530083546.4831-1-vaibhavgupta40@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>