most: add maintainer entry

This patch adds an entry in the MAINTAINERS file for the MOST(R)
Technology driver.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
Link: https://lore.kernel.org/r/20230209110651.168962-1-Parthiban.Veerasooran@microchip.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>