OMAP2+: Common CPU DIE ID reading code reads wrong registers for OMAP4430

This adapts the register offsets used to read the CPU DIE ID registers
when run on 44XX so they match what is in the OMAP4430 Reference Manual
page 269

Signed-off-by: Andy Green <andy.green@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>