ARM: mach-shmobile: sh7372 map_io and init_early update

Update the sh7372 SoC and the AP4EVB and Mackerel boards to make use
of the functions sh7372_map_io() and sh7372_add_early_devices().

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>