ARM: shmobile: r8a7791: Fix SD2CKCR register address

ARM: shmobile: r8a7791: Fix SD2CKCR register address

b5a173dd95c0ee01f30d5fc098ca1b1c5704785b
(ARM: shmobile: r8a7791: Add clocks)
added r8a7791 SD clocks when v3.14.

243e4e1dd15295db9b37b7b7b345c58954d22a4f
(ARM: shmobile: Add SDHI devices for Koelsch DTS)
enabled SD on r8a7791 Koelsch when v3.15.

91efc3f41c582c3096c1f50345a09db48d77299f
(ARM: shmobile: henninger: add SDHI0/2 DT support)
enable SD on r8a7791 Henninger when v3.16.

But r8a7791 SD clock had wrong address.
This patch fixup it.

[Kuninori Morimoto: tidyup for upstreaming]

Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>