NFC: st21nfcb: Remove double assignment of .owner in struct device_driver

The .owner member of struct device_driver is assigned THIS_MODULE twice.

Introduced by:

commit 35630df6


NFC: st21nfcb: Add driver for STMicroelectronics ST21NFCB NFC chip

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>