arm64: drop unused includes of <linux/personality.h>

Drop several includes of <linux/personality.h> which are not used.
git-blame indicates they were used at some point, but they're not needed
anymore.

Signed-off-by: Sagar Patel <sagarmp@cs.unc.edu>
Link: https://lore.kernel.org/r/20220307222412.146506-1-sagarmp@cs.unc.edu


Signed-off-by: Will Deacon <will@kernel.org>