Tegra: memctrl: check GPU reset state from common place

This patch moves the GPU reset state check, during VideoMem resize, to the
common SiP handler, to reduce code duplication.

Change-Id: I3818c5f104b809da83dc2a61d6a8149606f81c13
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/include/t210/tegra_def.h b/plat/nvidia/tegra/include/t210/tegra_def.h
index 2fcf25c..454c666 100644
--- a/plat/nvidia/tegra/include/t210/tegra_def.h
+++ b/plat/nvidia/tegra/include/t210/tegra_def.h
@@ -65,6 +65,8 @@
  * Tegra Clock and Reset Controller constants
  ******************************************************************************/
 #define TEGRA_CAR_RESET_BASE		U(0x60006000)
+#define TEGRA_GPU_RESET_REG_OFFSET	U(0x28C)
+#define  GPU_RESET_BIT			(U(1) << 24)
 
 /*******************************************************************************
  * Tegra Flow Controller constants