r600g: fix geom shader input indirect indexing.
r600g: fix geom shader input indirect indexing.

This fixes:
gs-input-array-vec4-index-rd

The others run out of gprs unfortunately.

Cc: "11.0 11.1" <59f39c0db42d4479a46b02d4d2bc11120e37bb44@lists.freedesktop.org>
Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler