[PATCH] Add __KERNEL__ to <linux/crc-ccitt.h>

The following adds a __KERNEL__ check to <linux/crc-ccitt.h>.  The problem
is that the ppp package includes <linux/ppp_defs.h> via <net/ppp_defs.h>,
which in turn gets <linux/crc-ccitt.h>.
Signed-off-by: Tom Rini <trini@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/crc-ccitt.h

 #ifndef _LINUX_CRC_CCITT_H
 #define _LINUX_CRC_CCITT_H
+#ifdef __KERNEL__
 
 #include <linux/types.h>
 
@@ -12,4 +13,5 @@ static inline u16 crc_ccitt_byte(u16 crc, const u8 c)
 	return (crc >> 8) ^ crc_ccitt_table[(crc ^ c) & 0xff];
 }
 
+#endif /* __KERNEL__ */
 #endif /* _LINUX_CRC_CCITT_H */