WindCharger: Added FPU emulation to the kernel.

This is to address a frequent SIGILL signal being sent to the hostapd
process.  Despite no FPU support being built into the toolchain, there
are still some uncaught FPU operations that should be handled by the
kernel.

Change-Id: Ia6f332330dda74bcb9e0e9c4308d63d7c6a2b116
diff --git a/arch/mips/configs/gfwc100_defconfig b/arch/mips/configs/gfwc100_defconfig
index 18d12e3..89302d8 100644
--- a/arch/mips/configs/gfwc100_defconfig
+++ b/arch/mips/configs/gfwc100_defconfig
@@ -1,6 +1,6 @@
 CONFIG_ATH79=y
 CONFIG_ATH79_MACH_GF_WINDCHARGER=y
-# CONFIG_MIPS_FPU_EMU is not set
+CONFIG_MIPS_FPU_EMU=y
 CONFIG_COMPACTION=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_HZ_100=y