x86-64: Fix compile error with clang

x86-64: Fix compile error with clang

Remove the 'f' suffix from a float literal.
    - .float 0.0f+1.0
    + .float 1.0

This fixes the following compile error with clang:
    error: unexpected token in directive
    .float 0.0f+1.0
              ^

Note: This is a candidate for the stable branches.
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chad Versace <chad@chad-versace.us>