svga: fix incorrect case in svga_typeless_format()

For the case of SVGA3D_X32_G8X24_UINT we incorrectly returned
SVGA3D_R32_FLOAT_X8X24.  We should return SVGA3D_R32G8X24_TYPELESS.

Note that we never actually use SVGA3D_X32_G8X24_UINT so this has
no impact.

No Piglit regressions.

Reviewed-by: Charmaine Lee <charmainel@vmware.com>
1 file changed