sh_fpu: Do not allow inclusion of fpu_control on not SH4 core
sh_fpu: Do not allow inclusion of fpu_control on not SH4 core

Instead of emitting a warning even when compiling for SH4, stop
compilation with an #error directive when not on SH4 core.

Signed-off-by: Carmelo Amoroso <532378793705a04edd56deb76ad8c0442834d55d@st.com>

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc