i965/fs: Use the UW type for the destination of VARYING_PULL_CONSTANT_LOAD instructions
i965/fs: Use the UW type for the destination of VARYING_PULL_CONSTANT_LOAD instructions

Using a floating-point type doesn't usually cause hangs on my HSW, but the
simulator complains about it quite a bit.

Signed-off-by: Jason Ekstrand <b186559eaedf698788888c8a2559b4efb4db10d6@intel.com>
Reviewed-by: Matt Turner <789b315743a28dd066a4ba1459c35951c291d8a6@gmail.com>

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