declance: Remove `incompatible pointer type' warnings

Revert damage caused by 43d620c82985b19008d87a437b4cf83f356264f7:

.../declance.c: In function 'cp_to_buf':
.../declance.c:347: warning: assignment from incompatible pointer type
.../declance.c:348: warning: assignment from incompatible pointer type
.../declance.c: In function 'cp_from_buf':
.../declance.c:406: warning: assignment from incompatible pointer type
.../declance.c:407: warning: assignment from incompatible pointer type

Also add a `const' qualifier where applicable and adjust formatting.

Signed-off-by: Maciej W. Rozycki <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/amd/declance.c

···
 		}
 
 		clen = len & 1;
-		rtp = tp;
-		rfp = fp;
+		rtp = (unsigned char *)tp;
+		rfp = (const unsigned char *)fp;
 		while (clen--) {
 			*rtp++ = *rfp++;
 		}
···
 		 * do the rest, if any.
 		 */
 		clen = len & 15;
-		rtp = (unsigned char *) tp;
-		rfp = (unsigned char *) fp;
+		rtp = (unsigned char *)tp;
+		rfp = (const unsigned char *)fp;
 		while (clen--) {
 			*rtp++ = *rfp++;
 		}
···
 
 		clen = len & 1;
 
-		rtp = tp;
-		rfp = fp;
+		rtp = (unsigned char *)tp;
+		rfp = (const unsigned char *)fp;
 
 		while (clen--) {
 			*rtp++ = *rfp++;
···
 		 * do the rest, if any.
 		 */
 		clen = len & 15;
-		rtp = (unsigned char *) tp;
-		rfp = (unsigned char *) fp;
+		rtp = (unsigned char *)tp;
+		rfp = (const unsigned char *)fp;
 		while (clen--) {
 			*rtp++ = *rfp++;
 		}