intel-ipmi-oem: add clear CMOS command

There is an i2c device on bus4, the slave address is 0x70. Based on the
spec, writing 0x1 to address 0x60 on this device, will trigger the clear
CMOS action.

Tested:
Run the below command in MFG mode:
ipmitool raw 0x32 0x91

Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
Change-Id: I2e549de7ab18c448e81cc8b431cf90bab8fd9dd0
2 files changed