m32r: add rtc_lock variable

Add a spinlock variable "rtc_lock".
This is taken from arch/arm/kernel/time.c.

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
This commit is contained in:
Hirokazu Takata 2009-08-26 13:13:12 +09:00
commit bac33bd571