NFC: digital: Remove PR_ERR and PR_DBG macros

They can be replaced by the standard pr_err and pr_debug one after
defining the right pr_fmt macro.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --cc net/nfc/digital.h
Simple merge

diff --cc net/nfc/digital_core.c
Simple merge

diff --cc net/nfc/digital_dep.c
Simple merge

diff --cc net/nfc/digital_technology.c
Simple merge