[PATCH] m32r: ds1302 driver

[PATCH] m32r: ds1302 driver

This is a DS1302 real-time clock driver.

It is moved from arch/m32r/drivers/, has been originally taken from
arch/cris/arch-v10/drivers/ds1302.c.

Currently, this driver supports only m32r target boards.  Maybe some work will
be required to support other target.

Signed-off-by: Hayato Fujiwara <fujiwara@linux-m32r.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>