MAINTAINERS: add Microchip PIT64B timer

Add Microchip PIT64B timer.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 7e46470..85e5185 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -292,6 +292,7 @@
 F:	arch/arm/mach-at91/
 F:	board/atmel/
 F:	drivers/misc/microchip_flexcom.c
+F:	drivers/timer/mchp-pit64b-timer.c
 
 ARM NEXELL S5P4418
 M:	Stefan Bosch <stefan_b@posteo.net>