T1040RDB and T1042RDB_PI has CPLD. Here CPLD controls board mux/features.

This support of CPLD includes
 - files and register defintion
 - Commands to swtich alternate bank and default bank
Signed-off-by: NPrabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: NYork Sun <yorksun@freescale.com>