gpu: nvgpu: Rearrange the static inline code

In order to avoid the circular dependencies,
rearrange the static inline functions from
gk20a.h file.

Moved gk20a_gr_flush_channel_tlb function to
gr_gk20a.c and removed the #include gr_gk20a.h
from gk20a.h

Added a helper function utils.h to
move all generic static inline functions which
have no reference to gpu related structures.

ptimer related functions are moved to
ptimer.h

Implementations for as and pmu are moved to
corresponding files.

JIRA NVGPU-624

Change-Id: I4e956326e773ba037bf3a1696cc4c462085dbbe5
Signed-off-by: Vinod G <vinodg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1781941
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/include/nvgpu/utils.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef NVGPU_UTILS_H
+#define NVGPU_UTILS_H
+
+#include <nvgpu/types.h>
+
+static inline u32 u64_hi32(u64 n)
+{
+	return (u32)((n >> 32) & ~(u32)0);
+}
+
+static inline u32 u64_lo32(u64 n)
+{
+	return (u32)(n & ~(u32)0);
+}
+
+static inline u64 hi32_lo32_to_u64(u32 hi, u32 lo)
+{
+	return  (((u64)hi) << 32) | (u64)lo;
+}
+
+static inline u32 set_field(u32 val, u32 mask, u32 field)
+{
+	return ((val & ~mask) | field);
+}
+
+static inline u32 get_field(u32 reg, u32 mask)
+{
+	return (reg & mask);
+}
+#endif /* NVGPU_UTILS_H */