ARM: shmobile: defconfig: Refresh for v5.10-rc1

Refresh the defconfig for Renesas ARM systems:
  - Reorder SoC-specific config options (cfr. commit 6d5aded8
    ("soc: renesas: Sort driver description title")).

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201103084136.1378875-1-geert+renesas@glider.be