video: tegra: nvmap: Add support for Serial Id feature

Add support for Serial Id feature which will be used by Nsight for
buffer tracking purpose. This feature expects a unique serial id per
buffer even if it is shared across multiple client processes.
Add following code:
- Create a new global counter field for serial id in nvmap device.
Initialize it to 0 when nvmap device is initialized.
- Introduce a new field for serial_id in nvmap_handle struct.
- When nvmap_handle is created, assign it's serial_id field with global
counter's value, and increment global counter.
- During NvRmMemQueryHandleParameters return this serial_id associated
with the handle.
- Do not decrement counter for serial_id even after freeing the handle.

Bug 4138373

Change-Id: Ic1fe22b082eefb352986f8fa44d4c38d186a366f
Signed-off-by: Ketan Patil <ketanp@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2918510
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

include/uapi/linux/nvmap.h

@@ -227,6 +227,7 @@ struct nvmap_handle_parameters {
     __u64 coherency;
     __u64 size;
     __u64 offset;
+    __u64 serial_id;
 };
 
 /**