Moving tegra_fiq_debugger driver to nvidia repo.

This is a migration patch from Kernel 4.9. As the original one
commit d2c919e9d698 ("platform: tegra: Import from linux-4.4")
included many other files and drivers while this one only aims
at the tegra_fiq_debugger, so renewing the commit log.

And, since the patch (https://git-master.nvidia.com/r/1554655),
commit b99e994f9bd6 ("platform: tegra: move tegra_fiq_debugger
from mach-tegra"), added its header file, this patch squashes
that one too.

It also fixes warnings reported by checkpatch script:
  WARNING: Missing a blank line after declarations
  #95: FILE: drivers/platform/tegra/tegra_fiq_debugger.c:68:
  +	struct tegra_fiq_debugger *t;
  +	t = container_of(dev_get_platdata(&pdev->dev), typeof(*t), pdata);

  WARNING: Missing a blank line after declarations
  #111: FILE: drivers/platform/tegra/tegra_fiq_debugger.c:84:
  +	struct tegra_fiq_debugger *t;
  +	t = container_of(dev_get_platdata(&pdev->dev), typeof(*t), pdata);

  WARNING: Missing a blank line after declarations
  #129: FILE: drivers/platform/tegra/tegra_fiq_debugger.c:102:
  +	struct tegra_fiq_debugger *t;
  +	t = container_of(dev_get_platdata(&pdev->dev), typeof(*t), pdata);

  WARNING: Missing a blank line after declarations
  #140: FILE: drivers/platform/tegra/tegra_fiq_debugger.c:113:
  +	struct tegra_fiq_debugger *t;
  +	t = container_of(dev_get_platdata(&pdev->dev), typeof(*t), pdata);

  WARNING: Possible unnecessary 'out of memory' message
  #166: FILE: drivers/platform/tegra/tegra_fiq_debugger.c:139:
  +	if (!t) {
  +		pr_err("Failed to allocate for fiq debugger\n");

  WARNING: Possible unnecessary 'out of memory' message
  #184: FILE: drivers/platform/tegra/tegra_fiq_debugger.c:157:
  +	if (!res) {
  +		pr_err("Failed to alloc fiq debugger resources\n");

  WARNING: Possible unnecessary 'out of memory' message
  #190: FILE: drivers/platform/tegra/tegra_fiq_debugger.c:163:
  +	if (!pdev) {
  +		pr_err("Failed to alloc fiq debugger platform device\n");

Bug 200416212

Change-Id: Iaea87259bcda9c5a2e1a01b03d905debe52aa016
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1750507
GVS: Gerrit_Virtual_Submit
Reviewed-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>