Adding rgb matrix speed into eeprom storage. (#5965)

Zeroing out spd in eeconfig_init_quantum

Switched to block read & update

Update tmk_core/common/eeconfig.h

Co-Authored-By: Drashna Jaelre <drashna@live.com>

Fixing init compile error

Update eeconfig.c

Dead / Missing API cleanup

alignment

users/xulkal/process_records.c

@@ -2,10 +2,6 @@
 #include "custom_keycodes.h"
 #include "timer_utils.h"
 
-#if defined(RGB_MATRIX_ENABLE)
-extern void eeconfig_update_rgb_matrix_default(void);
-#endif
-
 #ifdef TRILAYER_ENABLED
 uint32_t layer_state_set_user(uint32_t state)
 {