Chiptool chokes on registers with duplicate names and `dimIindex`

[inferiorhumanorgans]

See also #89 and #13 for further discussion. In this case the offending XML is:

<register>
    <dim>2</dim>
    <dimIncrement>0x4</dimIncrement>
    <dimIndex>MBIU,RAM0</dimIndex>
    <name>BUSSCNT%s</name>
    <description>Slave Bus Control Register %s</description>
    <addressOffset>0x1108</addressOffset>

<register>
    <dim>4</dim>
    <dimIncrement>0x4</dimIncrement>
    <dimIndex>P0B,P2B,P3B,P4B</dimIndex>
    <name>BUSSCNT%s</name>
    <description>Slave Bus Control Register %s</description>
    <addressOffset>0x1114</addressOffset>

And chiptool panics with a failed assertion for unique names.

[inferiorhumanorgans]

What's the preferred way to handle arrays with named indices? Break these out into individual registers with the index names appended e.g. BUSSCNTMBIU, BUSSCNTRAM0? Append the sequence as with the enums and treat them as arrays to be indexed by numbers e.g. BUSSCNT[0..2], BUSSCNT_2[0..3]?