ARM: multi_v7_defconfig: Remove Marzen

Kill of the defconfig bits now when the marzen-reference board code is gone.

Based on work by Magnus Damm.
Acked-by: Magnus Damm <damm@opensource.se>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/configs/multi_v7_defconfig

@@ -85,7 +85,6 @@ CONFIG_ARCH_R8A7791=y
 CONFIG_ARCH_R8A7793=y
 CONFIG_ARCH_R8A7794=y
 CONFIG_ARCH_SH73A0=y
-CONFIG_MACH_MARZEN=y
 CONFIG_ARCH_SUNXI=y
 CONFIG_ARCH_SIRF=y
 CONFIG_ARCH_TEGRA=y