Add option to define extra symbols for 'lf cmdread', required e.g. for Hitag Micro and for talking to HT2 in emulation mode

include/pm3_cmd.h

@@ -786,6 +786,7 @@ typedef struct {
 #define LF_DIVISOR_125 LF_FREQ2DIV(125)
 #define LF_DIVISOR_134 LF_FREQ2DIV(134.2)
 #define LF_DIV2FREQ(d) (12000.0/((d)+1))
+#define LF_CMDREAD_MAX_EXTRA_SYMBOLS 4
 
 // Receiving from USART need more than 30ms as we used on USB
 // else we get errors about partial packet reception