slcanpty: remove redundant asc2nibble()

asc2nibble() is already defined in lib.h. Include lib.h in slcnpty.c
so that asc2nibble() does not need to be redefined a second time and
adjust the Makefile accordingly.

Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://lore.kernel.org/all/20221114163848.3398-2-mailhol.vincent@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

CMakeLists.txt

@@ -33,6 +33,7 @@ set(PROGRAMS_CANLIB
     cansequence
     log2asc
     log2long
+    slcanpty
 )
 
 set(PROGRAMS_J1939
@@ -58,7 +59,6 @@ set(PROGRAMS
     isotptun
     slcan_attach
     slcand
-    slcanpty
 )
 
 add_executable(can-calc-bit-timing

Makefile

@@ -119,6 +119,7 @@ canplayer.o:	lib.h
 cansend.o:	lib.h
 log2asc.o:	lib.h
 log2long.o:	lib.h
+slcanpty.o:	lib.h
 j1939acd.o:	libj1939.h
 j1939cat.o:	libj1939.h
 j1939spy.o:	libj1939.h
@@ -135,6 +136,7 @@ cansend:	cansend.o	lib.o
 cansequence:	cansequence.o	lib.o
 log2asc:	log2asc.o	lib.o
 log2long:	log2long.o	lib.o
+slcanpty:	slcanpty.o	lib.o
 j1939acd:	j1939acd.o	libj1939.o
 j1939cat:	j1939cat.o	libj1939.o
 j1939spy:	j1939spy.o	libj1939.o

slcanpty.c

@@ -43,27 +43,14 @@
 #include <linux/can/raw.h>
 #include <linux/sockios.h>
 
+#include "lib.h"
+
 /* maximum rx buffer len: extended CAN frame with timestamp */
 #define SLC_MTU (sizeof("T1111222281122334455667788EA5F\r")+1)
 #define DEVICE_NAME_PTMX "/dev/ptmx"
 
 #define DEBUG
 
-static int asc2nibble(char c)
-{
-
-	if ((c >= '0') && (c <= '9'))
-		return c - '0';
-
-	if ((c >= 'A') && (c <= 'F'))
-		return c - 'A' + 10;
-
-	if ((c >= 'a') && (c <= 'f'))
-		return c - 'a' + 10;
-
-	return 16; /* error */
-}
-
 /* read data from pty, send CAN frames to CAN socket and answer commands */
 int pty2can(int pty, int socket, struct can_filter *fi,
 	    int *is_open, int *tstamp)