Staging: echo: remove __cplusplus macro magic

The kernel is written in C, so remove the __cplusplus macro magic from the
driver.

Cc: David Rowe <david@rowetel.com>
Cc: Steve Underwood <steveu@coppice.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/echo/bit_operations.h

@@ -30,10 +30,6 @@
 #if !defined(_BIT_OPERATIONS_H_)
 #define _BIT_OPERATIONS_H_
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #if defined(__i386__)  ||  defined(__x86_64__)
 /*! \brief Find the bit position of the highest set bit in a word
     \param bits The word to be searched
@@ -245,9 +241,5 @@ static __inline__ int parity32(uint32_t x)
 }
 /*- End of function --------------------------------------------------------*/
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif
 /*- End of file ------------------------------------------------------------*/

drivers/staging/echo/fir.h

@@ -105,10 +105,6 @@ typedef struct
 	float *history;
 } fir_float_state_t;
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 static __inline__ const int16_t *fir16_create(fir16_state_t *fir,
                                               const int16_t *coeffs,
                                               int taps)
@@ -312,9 +308,5 @@ static __inline__ int16_t fir32(fir32_state_t *fir, int16_t sample)
 }
 /*- End of function --------------------------------------------------------*/
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif
 /*- End of file ------------------------------------------------------------*/