rgblight split transfer non-eeprom config (#5396)

* Make rgblight_update_dword not update eeprom (we already have
eeconfig_update_rgblight for that).

Make split i2c keyboards transfer active rgblight config rather than
eeprom saved version of rgblight config, enabling runtime changes
that aren't persisted to eeprom.

* prev_level and prev_rgb only store successfully transmitted values

1 files changed, 1 insertions, 0 deletions

diff --git a/quantum/rgblight.h b/quantum/rgblight.h
index f92388c96..36e436b89 100644
--- a/quantum/rgblight.h
+++ b/quantum/rgblight.h
@@ -174,6 +174,7 @@ void rgblight_step_reverse(void);
 uint8_t rgblight_get_mode(void);
 void rgblight_mode(uint8_t mode);
 void rgblight_set(void);
+uint32_t rgblight_read_dword(void);
 void rgblight_update_dword(uint32_t dword);
 void rgblight_increase_hue(void);
 void rgblight_decrease_hue(void);