Prevent #define name clash

The files openair1/PHY/CODING/nrLDPC_cnProc.h and
openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_cnProc.h have the same name,
and also the same include guard/define. This commit renames the define
in the latter to prevent this name clash.

openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_cnProc.h

@@ -29,8 +29,8 @@
  * \warning
  */
 
-#ifndef __NR_LDPC_CNPROC__H__
-#define __NR_LDPC_CNPROC__H__
+#ifndef __NR_LDPC_DECODER_CNPROC__H__
+#define __NR_LDPC_DECODER_CNPROC__H__
 
 /**
    \brief Performs CN processing for BG2 on the CN processing buffer and stores the results in the CN processing results buffer.