pinctrl: renesas: r8a77990: Share SDHI pin group data

Pin groups sdhi[01]_data1 are subsets of sdhi[01]_data4.
Pin groups sdhi3_data[14] are subsets of sdhi3_data8.

This reduces kernel size by 56 bytes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/2f702b6c6114458a43a77ae04089e7f9e20482e5.1640269757.git.geert+renesas@glider.be