enable the rtc m48t86 on r8610 eval board

SVN-Revision: 15847

target/linux/rdc/config/profile-r8610

@@ -4,3 +4,5 @@ CONFIG_MTD_RDC3210_BUSWIDTH=2
 # CONFIG_MTD_RDC3210_FACTORY_PRESENT is not set
 CONFIG_MTD_RDC3210_SIZE=0x400000
 # CONFIG_MTD_RDC3210_STATIC_MAP is not set
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_M48T86=y