NFC: pn544: Separate the core code and the i2c one into different modules

As we may need to support other physical layers, we can avoid linking the
core part into each and every pn544 module.

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

drivers/nfc/Kconfig

@@ -5,19 +5,6 @@
 menu "Near Field Communication (NFC) devices"
 	depends on NFC
 
-config PN544_HCI_NFC
-	tristate "HCI PN544 NFC driver"
-	depends on I2C && NFC_HCI && NFC_SHDLC
-	select CRC_CCITT
-	default n
-	---help---
-	  NXP PN544 i2c driver.
-	  This is a driver based on the SHDLC and HCI NFC kernel layers and
-	  will thus not work with NXP libnfc library.
-
-	  To compile this driver as a module, choose m here. The module will
-	  be called pn544_hci.
-
 config NFC_PN533
 	tristate "NXP PN533 USB driver"
 	depends on USB
@@ -39,4 +26,6 @@ config NFC_WILINK
 	  Say Y here to compile support for Texas Instrument's NFC WiLink driver
 	  into the kernel or say M to compile it as module.
 
+source "drivers/nfc/pn544/Kconfig"
+
 endmenu