Omapconf: Array index matching

	In original code, the cpu_name and cpu_revision arrays
are initialized base upon the enum values in omap_chip and
omap_chip_revision.

	As we keep adding new chips and revisions, it'll increase
the mismatching chances. Therefore, it'll be handy if we initialize
the arrays by matching the values exactly to its corresponding index.

Signed-off-by: Jin Zheng <j-zheng@ti.com>