MAINTAINERS: update Microchip MPF FPGA reviewers

As I'm leaving Metrotek, hand over reviewing duty of Microchip MPF FPGA
driver to Vladimir.

Signed-off-by: Ivan Bornyakov <i.bornyakov@metrotek.ru>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Vladimir Georgiev <v.georgiev@metrotek.ru>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20230429104838.5064-2-i.bornyakov@metrotek.ru
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20230530134936.634370-2-yilun.xu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Ivan Bornyakov

MAINTAINERS

@@ -13836,7 +13836,7 @@ F:	drivers/tty/serial/8250/8250_pci1xxxx.c
 
 MICROCHIP POLARFIRE FPGA DRIVERS
 M:	Conor Dooley <conor.dooley@microchip.com>
-R:	Ivan Bornyakov <i.bornyakov@metrotek.ru>
+R:	Vladimir Georgiev <v.georgiev@metrotek.ru>
 L:	linux-fpga@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml