nrf5: Moving color defines in lcd_mono_fb from .c to .h so that it can be reused by other modules.

nrf5/lcd_mono_fb.c

@@ -37,9 +37,6 @@
 
 #if MICROPY_PY_LCD_MONO_FB
 
-#define LCD_BLACK 0
-#define LCD_WHITE 1
-
 typedef struct {
     mp_obj_base_t base;
     fb_byte_t * fb_bytes;

nrf5/lcd_mono_fb.h

@@ -31,6 +31,9 @@ extern const mp_obj_module_t mp_module_lcd_mono_fb;
 
 #include <stdint.h>
 
+#define LCD_BLACK 0
+#define LCD_WHITE 1
+
 typedef struct {
     uint8_t bit0 : 1;
     uint8_t bit1 : 1;