MLK-19433-1 imx: Add macro for chip rev 2.1

Add common CHIP_REV_2_1 for chip revision 2.1
Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit f7fc83ffb0f204d9f6ec6c77c08d23869d9ecde4)

Change-Id: I20d5809902431fa7323083d3829b45058de27738
1 file changed