arm: mach-omap2: cache: Explicitly enable I cache
omap-common cache enabling sequence relies on cpu_init_cp15() (inside start.S) for enabling I-caches. But cpu_init_cp15() can be skipped if CONFIG_SKIP_LOWLEVEL_INIT is defined. So enable I-caches if not enabled already. Debugged-by: NJean-Jacques Hiblot <jjhiblot@ti.com> Tested-by: NSteve Kipisz <s-kipisz2@ti.com> Signed-off-by: NLokesh Vutla <lokeshvutla@ti.com> Tested-by: NJean-Jacques Hiblot <jjhiblot@ti.com> Reviewed-by: NTom Rini <trini@konsulko.com>
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