[MIPS] IP27: Enable N32 support in defconfig.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/configs/ip27_defconfig

@@ -264,7 +264,7 @@ CONFIG_BINFMT_ELF=y
 CONFIG_MIPS32_COMPAT=y
 CONFIG_COMPAT=y
 CONFIG_MIPS32_O32=y
-# CONFIG_MIPS32_N32 is not set
+CONFIG_MIPS32_N32=y
 CONFIG_BINFMT_ELF32=y
 
 #