imx7: ccm: correct target interface num

According to i.MX 7Dual Applications Processor Reference Manual, Rev. 1
The target interface CCM root index ranges [0,124], so the number
should be 125.

Reported-by: Coverity 18045
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>