MAINTAINERS: Update AD7192 driver maintainer

MAINTAINERS: Update AD7192 driver maintainer

Alexandru Tachici has not been active. Also the email address included
is not reachable anymore. I was assigned to work on the driver instead.

Remove Alexandru Tachici and add myself as maintainer of AD7192 driver.

Signed-off-by: Alisa-Dariana Roman <alisa.roman@analog.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20240624124941.113010-7-alisa.roman@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>