gpu: nvgpu: Move sysfs dependencies from HAL to Linux

Move sysfs dependencies from gk20a/ and gp10b/ to common/linux. At
the same time the gk20a and gp10b variants are merged into one.

JIRA NVGPU-48

Change-Id: I212be8f1beb8d20a57de04a57513e8fa0e2e83b4
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master/r/1466055
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/common/linux/sysfs.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef NVGPU_SYSFS_H
+#define NVGPU_SYSFS_H
+
+struct device;
+
+int nvgpu_create_sysfs(struct device *dev);
+void nvgpu_remove_sysfs(struct device *dev);
+
+#endif