ARM: shmobile: r8a7791: Fix SD2CKCR register address

ARM: shmobile: r8a7791: Fix SD2CKCR register address

59e79895b95892863617ce630fbda467f2470575
(ARM: shmobile: r8a7791: Add clocks)
added r8a7791 SD clocks when v3.14.

2c60a7df72711fb8b4be1e6aa651ab166a8931bc
(ARM: shmobile: Add SDHI devices for Koelsch DTS)
enabled SD on r8a7791 Koelsch when v3.15.

1299df03d7191ab4356c995dde8b912d3c8922e9
(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>