NFC: pn533: Separate physical layer from the core implementation

The driver now has all core stuff isolated in one file, and all
the hardware link specifics in another. Writing a pn533 driver
on top of another hardware link is now just a matter of adding a
new file for that new hardware specifics.

The first user of this separation will be the i2c based pn532
driver that reuses pn533 core implementation on top of an i2c
layer.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig
index 7437c9d..ea8321a 100644
--- a/drivers/nfc/Kconfig
+++ b/drivers/nfc/Kconfig
@@ -5,16 +5,6 @@
 menu "Near Field Communication (NFC) devices"
 	depends on NFC
 
-config NFC_PN533
-	tristate "NXP PN533 USB driver"
-	depends on USB
-	help
-	  NXP PN533 USB driver.
-	  This driver provides support for NFC NXP PN533 devices.
-
-	  Say Y here to compile support for PN533 devices into the
-	  kernel or say M to compile it as module (pn533).
-
 config NFC_WILINK
 	tristate "Texas Instruments NFC WiLink driver"
 	depends on TI_ST && NFC_NCI
@@ -70,6 +60,7 @@
 
 source "drivers/nfc/fdp/Kconfig"
 source "drivers/nfc/pn544/Kconfig"
+source "drivers/nfc/pn533/Kconfig"
 source "drivers/nfc/microread/Kconfig"
 source "drivers/nfc/nfcmrvl/Kconfig"
 source "drivers/nfc/st21nfca/Kconfig"