RFID: Fix various EM-Marin typos (#635)

applications/lfrfid/helpers/encoder-emmarin.h

@@ -0,0 +1,22 @@
+#pragma once
+#include "encoder-generic.h"
+
+class EncoderEM : public EncoderGeneric {
+public:
+    /**
+     * @brief init data to emulate
+     * 
+     * @param data 1 byte FC, next 4 byte SN
+     * @param data_size must be 5
+     */
+    void init(const uint8_t* data, const uint8_t data_size) final;
+
+    void get_next(bool* polarity, uint16_t* period, uint16_t* pulse) final;
+
+private:
+    // clock pulses per bit
+    static const uint8_t clocks_per_bit = 64;
+
+    uint64_t card_data;
+    uint8_t card_data_index;
+};