Tegra: T30: Beaver board support.

Beaver is a Tegra30 board that is nearly 100% compatible w/Cardhu.
Add a Beaver build so it can begin to be differentiated, if need be.

Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index bbab5fe..643a5ac 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -994,6 +994,7 @@
 	paz00		Tegra20 (ARM7 & A9 Dual Core)
 	trimslice	Tegra20 (ARM7 & A9 Dual Core)
 	whistler	Tegra20 (ARM7 & A9 Dual Core)
+	beaver		Tegra30 (ARM7 & A9 Quad Core)
 
 Stephen Warren <swarren@wwwdotorg.org>