staging: csr: remove CsrMutexLock function

nobody inside the csr directory is calling this function, so remove this
Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/csr/csr_framework_ext.c

@@ -60,34 +60,6 @@ void CsrMutexDestroy(CsrMutexHandle *mutexHandle)
 {
 }
 
-/*----------------------------------------------------------------------------*
- *  NAME
- *      CsrMutexLock
- *
- *  DESCRIPTION
- *      Lock the mutex refered to by the provided handle.
- *
- *  RETURNS
- *      Possible values:
- *          CSR_RESULT_SUCCESS           in case of success
- *          CSR_FE_RESULT_INVALID_HANDLE    in case the mutexHandle is invalid
- *
- *----------------------------------------------------------------------------*/
-CsrResult CsrMutexLock(CsrMutexHandle *mutexHandle)
-{
-    if (mutexHandle == NULL)
-    {
-        return CSR_FE_RESULT_INVALID_POINTER;
-    }
-
-    if (down_interruptible(mutexHandle))
-    {
-        return CSR_FE_RESULT_INVALID_POINTER;
-    }
-
-    return CSR_RESULT_SUCCESS;
-}
-
 /*----------------------------------------------------------------------------*
  *  NAME
  *      CsrMutexUnlock

drivers/staging/csr/csr_framework_ext.h

@@ -111,21 +111,6 @@ void CsrEventDestroy(CsrEventHandle *eventHandle);
  *----------------------------------------------------------------------------*/
 CsrResult CsrMutexCreate(CsrMutexHandle *mutexHandle);
 
-/*----------------------------------------------------------------------------*
- *  NAME
- *      CsrMutexLock
- *
- *  DESCRIPTION
- *      Lock the mutex refered to by the provided handle.
- *
- *  RETURNS
- *      Possible values:
- *          CSR_RESULT_SUCCESS           in case of success
- *          CSR_FE_RESULT_INVALID_HANDLE    in case the mutexHandle is invalid
- *
- *----------------------------------------------------------------------------*/
-CsrResult CsrMutexLock(CsrMutexHandle *mutexHandle);
-
 /*----------------------------------------------------------------------------*
  *  NAME
  *      CsrMutexUnlock