Defconfigs and RTC

[Ralf Baechle <ralf@linux-mips.org>]

Quite a few of the defconfigs have not been updated for quite some time
and are beginning to be a bit useless.  Also since we switched to RTC_LIB
quite a few systems no longer read their RTCs on bootup so their
defconfigs should be updated to enable RTC_CLASS and CONFIG_RTC_HCTOSYS.
A hand full of systems is still using read_persistent_clock() to read
the RTC on bootup.  The use of this function should preferably be replaced
by RTC_CLASS and CONFIG_RTC_HCTOSYS.

  Ralf