Extract PIT related macros to the newly created peripherals/pit.h

right/src/key_scanner.h

@@ -3,17 +3,13 @@
 
 // Includes:
 
+    #include "peripherals/pit.h"
     #include "right_key_matrix.h"
 
 // Macros:
 
     #define KEY_SCANNER_INTERVAL_USEC (1000 / RIGHT_KEY_MATRIX_ROWS_NUM)
 
-    #define PIT_KEY_SCANNER_HANDLER PIT1_IRQHandler
-    #define PIT_KEY_SCANNER_IRQ_ID PIT1_IRQn
-    #define PIT_KEY_SCANNER_CHANNEL kPIT_Chnl_1
-    #define PIT_SOURCE_CLOCK CLOCK_GetFreq(kCLOCK_BusClk)
-
 // Functions:
 
     void InitKeyScanner(void);