lavapipe: Fix bad array index scale factor in lvp_inline_uniforms pass

lavapipe: Fix bad array index scale factor in lvp_inline_uniforms pass

A few lines earlier uni_offsets is accessed with ubo scaled by
PIPE_MAX_CONSTANT_BUFFERS:

   if (uni_offsets[ubo * PIPE_MAX_CONSTANT_BUFFERS + i] == offset)

Found by inspection.

Looking at the before and after NIR code for
dEQP-VK.graphicsfuzz.cov-int-initialize-from-multiple-large-arrays,
using the correct indexing appears to enable the pass to inline an
additional uniform. My guess is that when a uniform is used more than
once, the first loop wouldn't find the offset recored in the table
because it was recorded at the wrong location.

Fixes: d23a9380dd6 ("lavapipe: implement extreme uniform inlining")
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21144>
(cherry picked from commit a7696a4d98bcf4cdfae1c56a21c4deb3a9ce004f)