Replace ukbhit by kbd_enter_pressed, not requiring tcgetattr:

Note that it behaves differently now
* it looks for Enter key only, not any key
* it "eats" the input, no need for (void)getchar() after it
* it works the same no matter the value of ICANON
* the mingw version has been adapted to act the similarly

This should fix its usage on Android where tcgetattr always returns -1

client/cmdsmartcard.c

@@ -914,9 +914,7 @@ static int smart_brute_sfi(bool decodeTLV) {
 
         for (uint16_t rec = 1; rec <= 255; rec++) {
 
-            if (ukbhit()) {
-                int gc = getchar();
-                (void)gc;
+            if (kbd_enter_pressed()) {
                 PrintAndLogEx(WARNING, "\naborted via keyboard!\n");
                 free(buf);
                 return 1;