Added OLED fade out support (#12086)

drivers/oled/oled_driver.h

@@ -154,6 +154,14 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    endif
 #endif
 
+#if !defined(OLED_FADE_OUT_INTERVAL)
+#    define OLED_FADE_OUT_INTERVAL 0x00
+#endif
+
+#if OLED_FADE_OUT_INTERVAL > 0x0F || OLED_FADE_OUT_INTERVAL < 0x00
+#    error OLED_FADE_OUT_INTERVAL must be between 0x00 and 0x0F
+#endif
+
 #if !defined(OLED_I2C_TIMEOUT)
 #    define OLED_I2C_TIMEOUT 100
 #endif