MAINTAINERS: zynqmp: Point to proper zynqmp folder

Point to Zynqmp arm64 cpu folder not to Zynq arm32.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 5b139e5..031f7ea 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -274,7 +274,7 @@
 M:	Michal Simek <michal.simek@xilinx.com>
 S:	Maintained
 T:	git git://git.denx.de/u-boot-microblaze.git
-F:	arch/arm/mach-zynq/
+F:	arch/arm/cpu/armv8/zynqmp/
 F:	drivers/clk/clk_zynqmp.c
 F:	drivers/fpga/zynqpl.c
 F:	drivers/gpio/zynq_gpio.c