ARM: shmobile: r8a7790: add missing 0x0100 for SDCKCR

ARM: shmobile: r8a7790: add missing 0x0100 for SDCKCR

9f13ee6f83c52065112d3e396e42e3780911ef53
(ARM: shmobile: r8a7790: add div4 clocks)
added r8a7790 DIV4 clock support.

But, it is missing
"0x0100: x 1/8" division ratio.
This patch fixes hidden bug.
It is based on R-Car H2 v0.7, R-Car M2 v0.9.

Reported-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
(cherry picked from commit 4fb12fe9c34928c1d2bed817e144aec3f44540e9)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>