svga: Clamp advertised PIPE_SHADER_CAP_MAX_TEMPS to SVGA3D_TEMPREG_MAX.
svga: Clamp advertised PIPE_SHADER_CAP_MAX_TEMPS to SVGA3D_TEMPREG_MAX.

Some backends may advertise more temps than SVGA3D_TEMPREG_MAX, but the
driver is hardwired to only support up to the value defined by
SVGA3D_TEMPREG_MAX, so clamp to it.

Reviewed-by: Brian Paul <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@vmware.com>

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