Enabling L2 cache of Cortex-A8 based OMAP3 has to be done by
bootloader. Check if this is done and warn if not.
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>

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Changes in v3: Remove braces. Thanks to Felipe for review!
Signed-off-by: Tony Lindgren <tony@atomide.com>