DEVELOPERS: add Masahiro Yamada as contact for arm_foundation_v8_defconfig

Masahiro is the last person who made significant changes to this
defconfig, so let's add him as a contact for it, so that he receives
notifications of build failures and gets Cc'ed on patches.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

DEVELOPERS

@@ -1566,6 +1566,10 @@ F:	package/tslib/
 F:	package/x11r7/xdriver_xf86-input-tslib/
 F:	package/x11vnc/
 
+N:	Masahiro Yamada <yamada.masahiro@socionext.com>
+F:	board/arm/foundation-v8/
+F:	configs/arm_foundationv8_defconfig
+
 N:	Mathieu Audat <mathieuaudat@gmail.com>
 F:	board/technologic/ts4900/
 F:	configs/ts4900_defconfig