Fix some definition and declaration

common/keyboard.c

@@ -31,6 +31,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "bootmagic.h"
 #include "eeconfig.h"
 #include "backlight.h"
+#include "breathing_led.h"
 #include "keymap_ex.h"
 #ifdef MOUSEKEY_ENABLE
 #   include "mousekey.h"

keyboard/gh60/backlight.c

@@ -21,6 +21,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "backlight.h"
 #include "breathing_led.h"
 
+#ifdef BACKLIGHT_ENABLE
+
+void backlight_enable(void);
+void backlight_disable(void);
+inline void backlight_set_raw(uint8_t raw);
+
 #ifdef GH60_REV_CHN
 #else
 #define SOFTPWM_TIMER_TOP F_CPU/(256*64)
@@ -149,3 +155,5 @@ ISR(TIMER1_COMPA_vect)
     }
 }
 #endif
+
+#endif