arm64: entry: Fix typo

Fix the following typo in entry-common.c
intrumentable => instrumentable

Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/1667027268-1255-1-git-send-email-quic_mojha@quicinc.com


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