r600g: fix udiv/idiv/umod/imod on cayman
r600g: fix udiv/idiv/umod/imod on cayman

Cayman needs some of the MUL instructions spread across a full slot
of vectors.

It also no longer has RECIP_UINT, the recommendation is to replace it
with a U2F + RECIP_IEEE + MUL + F2U.

Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>

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