Veyron: Add rockchip to SoC family

Some tests such as graphics_KernelMemory read SoC name and Gpu family from
/proc/cpuinfo.

BUG=chrome-os-partner:32298
TEST=graphics_KernelMemory pass on pinky board

Change-Id: If2a71661819b7e13170678537f3d62d150481a5c
Signed-off-by: ZhengShunQian <[email protected]>
Reviewed-on: https://chromium-review.googlesource.com/219678
Reviewed-by: Xu Jianqun <[email protected]>
Reviewed-by: Ilja Friedel <[email protected]>
diff --git a/client/bin/base_utils.py b/client/bin/base_utils.py
index 9097573..207a6f9 100644
--- a/client/bin/base_utils.py
+++ b/client/bin/base_utils.py
@@ -319,6 +319,8 @@
         return 'exynos5'
     elif list_grep(cpuinfo, 'Tegra'):
         return 'tegra'
+    elif list_grep(cpuinfo, 'Rockchip'):
+        return 'rockchip'
     return 'arm'
 
 def get_cpu_soc_family():