lib: crc8: add new library module providing crc8 algorithm

The brcm80211 driver in staging tree uses a crc8 function. Based on
feedback from John Linville to move this to lib directory, the linux
source has been searched. Although there is currently only one other
kernel driver using this algorithm (ie. drivers/ssb) we are providing
this as a library function for others to use.

Cc: linux-kernel@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: Dan Carpenter <error27@gmail.com>
Cc: George Spelvin <linux@horizon.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Reviewed-by: Henry Ptasinski <henryp@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Reviewed-by: "Franky (Zhenhui) Lin" <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/lib/Kconfig b/lib/Kconfig
index 9c10e38..ff9e5a3 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -89,6 +89,13 @@
 	  require M here.  See Castagnoli93.
 	  Module will be libcrc32c.
 
+config CRC8
+	tristate "CRC8 function"
+	help
+	  This option provides CRC8 function. Drivers may select this
+	  when they need to do cyclic redundancy check according CRC8
+	  algorithm. Module will be called crc8.
+
 config AUDIT_GENERIC
 	bool
 	depends on AUDIT && !AUDIT_ARCH