pinctrl: sh-pfc: r8a7796: Fix MSIOF3 SS2_E mux

Fix a copy-and-paste bug in the MSIOF3 SS2_E mux array.

Fixes: 4753231c

 ("pinctrl: sh-pfc: r8a7796: Add MSIOF pins, groups and functions")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>