t19x: cvnas: expose cvsram base and size to kernel

Add nvcvnas_get_cvsram_base and nvcvnas_get_cvsram_size,
Use them in pva_queue.c and nvhost_buffer.c
instead of hardcoded values.

JIRA EVLR-2273

Change-Id: I3fbec50a2c57220034b25b3a91569ba4aec319f6
Signed-off-by: Damian Halas <dhalas@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1651414
Reviewed-by: Puneet Saxena <puneets@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Nirav Patel <nipatel@nvidia.com>

include/linux/cvnas.h

@@ -0,0 +1,28 @@
+/*
+ * include/linux/cvnas.h
+ *
+ * Tegra cvnas driver
+ *
+ * Copyright (c) 2018, NVIDIA Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef __LINUX_CVNAS_H
+#define __LINUX_CVNAS_H
+
+int nvcvnas_busy(void);
+int nvcvnas_idle(void);
+phys_addr_t nvcvnas_get_cvsram_base(void);
+size_t nvcvnas_get_cvsram_size(void);
+
+#endif