ARM: shmobile: sh7372: Add shmobile_init_late()

Extend sh7372 SoC machine vector to include shmobile_init_late()
so Suspend-to-RAM and CPUIdle are setup as expected.

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