[Bug] Compile error with USE_I2C and RGB_MATRIX_SPLIT

Describe the Bug

1. config RGB_MATRIX_ENABLE = yes and RGB_MATRIX_DRIVER = WS2812
2. define USE_I2C and RGB_MATRIX_SPLIT
3. Compile error occurs.

System Information

• Keyboard: Original
  • https://github.com/yoyo-real/qmk_firmware/tree/feature/YK-4
• Operating system:
  • Windows
• AVR GCC version:
  • avr-gcc.exe (GCC) 8.4.0
• ARM GCC version:
  • arm-none-eabi-gcc.exe (GCC) 10.1.0
• QMK Firmware version:
  • 0.13.9

Additional Context

Compiling: quantum/process_keycode/process_magic.c                                                  [OK]
Compiling: quantum/process_keycode/process_grave_esc.c                                              [OK]
Compiling: quantum/split_common/transport.c                                                        quantum/split_common/transport.c: In function 'transport_master':
quantum/split_common/transport.c:169:5: error: cannot convert to a pointer type
     i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_RGB_MATRIX_START, (void *)rgb_matrix_config, sizeof(i2c_buffer->rgb_matrix), TIMEOUT);
     ^~~~~~~~~~~~
quantum/split_common/transport.c: In function 'transport_slave':
quantum/split_common/transport.c:225:5: error: cannot convert to a pointer type
     memcpy((void *)i2c_buffer->rgb_matrix, (void *)rgb_matrix_config, sizeof(i2c_buffer->rgb_matrix));
     ^~~~~~
quantum/split_common/transport.c:225:5: error: cannot convert to a pointer type
quantum/split_common/transport.c:225:5: error: null argument where non-null required (argument 1) [-Werror=nonnull]
quantum/split_common/transport.c:225:5: error: null argument where non-null required (argument 2) [-Werror=nonnull]
cc1.exe: all warnings being treated as errors
 [ERRORS]
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make[1]: *** [tmk_core/rules.mk:436: .build/obj_yk_4_default/quantum/split_common/transport.o] エラー 1
Make finished with errors
make: *** [Makefile:530: yk_4:default] エラー 1