PCI: tegra: No need to check return value of debugfs_create() functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Acked-by: Thierry Reding <[email protected]>
Cc: Lorenzo Pieralisi <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Jonathan Hunter <[email protected]>
Cc: Vidya Sagar <[email protected]>
Cc: Andrew Murray <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

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