[Bug libgcc/78804] [RX] -m64bit-doubles does not work

[claziss at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78804

--- Comment #17 from Claudiu Zissulescu <claziss at gmail dot com> ---
Removing FLOAT_BIT_ORDER_MISMATCH seems it doesn't affect ARC backend as well.