Fix warnings

Author: ikspress

libnfc/drivers/acr122s.c

@@ -417,7 +417,7 @@ acr122s_scan(const nfc_context *context, nfc_connstring connstrings[], const siz
   size_t device_found = 0;
   serial_port sp;
   char **acPorts = uart_list_ports();
-  const char *acPort;
+  char *acPort;
   int     iDevice = 0;
 
   while ((acPort = acPorts[iDevice++])) {

libnfc/drivers/arygon.c

@@ -103,7 +103,7 @@ arygon_scan(const nfc_context *context, nfc_connstring connstrings[], const size
   size_t device_found = 0;
   serial_port sp;
   char **acPorts = uart_list_ports();
-  const char *acPort;
+  char *acPort;
   int     iDevice = 0;
 
   while ((acPort = acPorts[iDevice++])) {

libnfc/drivers/pn532_uart.c

@@ -77,7 +77,7 @@ pn532_uart_scan(const nfc_context *context, nfc_connstring connstrings[], const
   size_t device_found = 0;
   serial_port sp;
   char **acPorts = uart_list_ports();
-  const char *acPort;
+  char *acPort;
   int     iDevice = 0;
 
   while ((acPort = acPorts[iDevice++])) {