* config/tc-arc.c (arc_parse_cons_expression): Don't treat @h30 at
        start of line specially.
        (md_assemble): Remove code that misparses symbols that start like a
        PIC/sda suffix.
        Fix check for @sda to test for the 'a'.
        * testsuite/gas/arc/arc700.exp: Run pltfun / h30fun tests.
        * testsuite/gas/arc/pltfun.s, testsuite/gas/arc/pltfun.d: New test.
        * testsuite/gas/arc/h30fun.s, testsuite/gas/arc/h30fun.d: New test.