fixed problem with implicit declaration in quantum/rgblight.c (#8406)

* Update tmk_core/common/progmem.h

Co-Authored-By: Ryan <[email protected]>

* Update quantum/rgblight.c

Co-Authored-By: Ryan <[email protected]>

* fixed problem with implicit declaration in quantum/rgblight.c (#8381)

Co-authored-by: Ryan <[email protected]>

drivers/oled/oled_driver.c

@@ -23,9 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <string.h>
 
 #include "progmem.h"
-#ifndef __AVR__
-#    define memcpy_P(des, src, len) memcpy(des, src, len)
-#endif
 
 // Used commands from spec sheet: https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
 // for SH1106: https://www.velleman.eu/downloads/29/infosheets/sh1106_datasheet.pdf