Describe the eMMC on the Gray Hawk Single board.
Signed-off-by: Cong Dang <cong.dang.xn@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/208bfc781b1488e253e19626ad80876c34c86758.1707915763.git.geert+renesas@glider.be