Fix a couple of minor typo's
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Add tables for ld & st

This commit adds tables for ld / st and the complete set of ld / st
at all widths.  This reduces the number of lines of patterns considerably,
which, IMO, makes it all easier to read.
Add a table for mul and div suffix codes

The mul and div opcode all take a suffix that determins the signedness
of the arguments.  Make a table for this information.
Make all instruction unabiguous

The table driven assembler makes more sense if the unknow instruction
patterns all have different opcodes.  It's also best if each opcode is
one word.
Merge branch 'master' of https://github.com/hermanhermitage/videocoreiv