cris: define __fls

Like fls, but can't be handed 0 and returns the bit number.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>

arch/cris/include/asm/bitops.h

@@ -148,6 +148,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
 #define ffs kernel_ffs
 
 #include <asm-generic/bitops/fls.h>
+#include <asm-generic/bitops/__fls.h>
 #include <asm-generic/bitops/fls64.h>
 #include <asm-generic/bitops/hweight.h>
 #include <asm-generic/bitops/find.h>