pinctrl: renesas: r8a7790: Share SDHI pin group data

Pin groups sdhi[0-3]_data1 are subsets of sdhi[0-3]_data4.

This reduces kernel size by 32 bytes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/88a3c2b09d34f2a528ecaa1bd55b6a96e156f5b1.1640269757.git.geert+renesas@glider.be