toshiba: Add correct printk log level while emitting error log

The printk functions are invoked without specifying required
log level when printing error messages. This commit replaces
all direct uses of printk with their corresponding pr_err/info/debug
variant.

Signed-off-by: Rishi Gupta <gupt21@gmail.com>
Link: https://lore.kernel.org/r/1566113671-8743-1-git-send-email-gupt21@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>