tpm: Get rid of chip->pdev

This is a hold over from before the struct device conversion.

- All prints should be using &chip->dev, which is the Linux
  standard. This changes prints to use tpm0 as the device name,
  not the PnP/etc ID.
- The few places involving sysfs/modules that really do need the
  parent just use chip->dev.parent instead
- We no longer need to get_device(pdev) in any places since it is no
  longer used by any of the code. The kref on the parent is held
  by the device core during device_add and dropped in device_del

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

drivers/char/tpm/tpm.h

@@ -167,7 +167,6 @@ enum tpm_chip_flags {
 };
 
 struct tpm_chip {
-	struct device *pdev;	/* Device stuff */
 	struct device dev;
 	struct cdev cdev;
 
@@ -199,7 +198,7 @@ struct tpm_chip {
 
 static inline void tpm_chip_put(struct tpm_chip *chip)
 {
-	module_put(chip->pdev->driver->owner);
+	module_put(chip->dev.parent->driver->owner);
 }
 
 static inline int tpm_read_index(int base, int index)