ARM: shmobile: defconfig: Refresh

- CONFIG_AEABI is enabled since commit 49460970 ("ARM: always
    enable AEABI for ARMv6+"),
  - CONFIG_SERIAL_SH_SCI_CONSOLE is enabled since commit
    c5bb576d ("tty: serial: sh-sci: Hide serial console config
    question"),
  - CONFIG_SERIAL_SH_SCI_DMA is enabled since commit be7e251d
    ("tty: serial: sh-sci: Hide DMA config question").

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>