NFC: Initial LLCP support

This patch is an initial implementation for the NFC Logical Link Control
protocol. It's also known as NFC peer to peer mode.
This is a basic implementation as it lacks SDP (services Discovery
Protocol), frames aggregation support, and frame rejecion parsing.
Follow up patches will implement those missing features.
This code has been tested against a Nexus S phone implementing LLCP 1.0.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/nfc/llcp/Kconfig b/net/nfc/llcp/Kconfig
new file mode 100644
index 0000000..fbf5e81
--- /dev/null
+++ b/net/nfc/llcp/Kconfig
@@ -0,0 +1,7 @@
+config NFC_LLCP
+       depends on NFC && EXPERIMENTAL
+       bool "NFC LLCP support (EXPERIMENTAL)"
+       default n
+       help
+	 Say Y here if you want to build support for a kernel NFC LLCP
+	 implementation.
\ No newline at end of file