changes:
KEY_SELECT removed from input file for u-boot -LS1
Input files added for LS1 (group 5)
Added proper address of u-boot for u-boot header
LS1021: unisign fixed for group5
code clean up
code cleanup
Added sample input file for legacy boot feature in dir: input_files/legacy_cfsign/
Added legacy boot feature
code clean up
Entry point and address changed for increased U-boot Size
add support for SDHC in CSF(ESBC) Header
input files modified for c29x
