[FL-1059] T5577 write (#463)

* Api-hal-gpio: extend init functions
* App Lfrfid: separate protocol layer
* App Lfrfid: write EM key scene
* App Lfrfid: syntax fix

firmware/targets/f5/api-hal/api-hal-gpio.h

@@ -153,6 +153,8 @@ typedef enum {
     GpioAltFn14LPTIM2 = 14, /*!< LPTIM2 Alternate Function mapping */
 
     GpioAltFn15EVENTOUT = 15, /*!< EVENTOUT Alternate Function mapping */
+
+    GpioAltFnUnused = 16, /*!< just dummy value */
 } GpioAltFn;
 
 /**
@@ -164,7 +166,14 @@ typedef struct {
 } GpioPin;
 
 /**
- * GPIO initialization function
+ * GPIO initialization function, simple version
+ * @param gpio  GpioPin
+ * @param mode  GpioMode
+ */
+void hal_gpio_init_simple(const GpioPin* gpio, const GpioMode mode);
+
+/**
+ * GPIO initialization function, normal version
  * @param gpio  GpioPin
  * @param mode  GpioMode
  * @param pull  GpioPull
@@ -177,14 +186,14 @@ void hal_gpio_init(
     const GpioSpeed speed);
 
 /**
- * GPIO initialization with alternative function
+ * GPIO initialization function, extended version
  * @param gpio  GpioPin
  * @param mode  GpioMode
  * @param pull  GpioPull
  * @param speed GpioSpeed
  * @param alt_fn GpioAltFn
  */
-void hal_gpio_init_alt(
+void hal_gpio_init_ex(
     const GpioPin* gpio,
     const GpioMode mode,
     const GpioPull pull,