[Mesa-stable] Cherry-pick Braswell commits to 10.6

[Mark Janes]

Hi Emil,

Can you please cherry-pick these commits to 10.6?  They prevent GPU
hangs on Braswell.

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commit b307921c3ff3b36607752f881a180272366a79cf
Author: Ben Widawsky <benjamin.widawsky at intel.com>
Date:   Wed May 27 17:55:02 2015 -0700

    i965: Disable compaction for EOT send messages
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commit 6c846dc57b1d6f3e015a604dba1976f96c4be9e9
Author: Neil Roberts <neil at linux.intel.com>
Date:   Thu May 28 15:27:31 2015 +0100

    i965: Don't use a temporary when generating an indirect sample
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commit 7f62fdae1629d75dd581d1c57b28c2f099c5ef6b
Author: Neil Roberts <neil at linux.intel.com>
Date:   Fri May 29 13:41:48 2015 +0100

    i965: Don't add base_binding_table_index if it's zero
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commit d46d04529b9c1e55b4c3b65a7078bbbd7ab1a810
Author: Matt Turner <mattst88 at gmail.com>
Date:   Tue Jun 2 17:46:38 2015 -0700

    i965: Use UW-typed immediate in multiply inst.
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Thanks!