MAINTAINERS: Add myself as maintainer for hikey

This patch adds myself as maintainer for the hikey
U-Boot port.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

MAINTAINERS

@@ -103,6 +103,12 @@ F:	arch/arm/include/asm/arch-mx*/
 F:	arch/arm/include/asm/arch-vf610/
 F:	arch/arm/include/asm/imx-common/
 
+ARM HISILICON
+M:	Peter Griffin <peter.griffin@linaro.org>
+S:	Maintained
+F:	arch/arm/cpu/armv8/hisilicon
+F:	arm/include/asm/arch-hi6220/
+
 ARM MARVELL KIRKWOOD ARMADA-XP ARMADA-38X
 M:	Prafulla Wadaskar <prafulla@marvell.com>
 M:	Luka Perkov <luka.perkov@sartura.hr>

board/hisilicon/hikey/MAINTAINERS

+HIKEY BOARD
+M:     Peter Griffin <peter.griffin@linaro.org>
+S:     Maintained
+F:     board/hisilicon/hikey
+F:     include/configs/hikey.h
+F:     configs/hikey_defconfig