[PATCH][SPARC] gas: fix CBCOND diagnostics for invalid immediate operands.

[Jose E. Marchesi]

    >     gas/ChangeLog:
    >         
    >     2016-11-16  Jose E. Marchesi  <jose.marchesi@oracle.com>
    >         
    >         	* config/tc-sparc.c (sparc_ip): Avoid emitting a cbcond error
    >         	messages for non-cbcond instructions.
    >         	* testsuite/gas/sparc/cbcond-diag.s: New file.
    >         	* testsuite/gas/sparc/cbcond-diag.l: Likewise.
    >         	* testsuite/gas/sparc/sparc.exp (gas_64_check): Run cbcond-diag tests.
    
    Approved - please apply.
    
Applied to master.
Thanks!