Compile issue with arm-linux-gnueabihf toolchains

Fails to compile with gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf:

 arm-linux-gnueabihf-ld.bfd: error: /opt/gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/6.2.1/libgcc.a(_udivmoddi4.o) uses VFP register arguments, u-boot does not
