Fix the following coccicheck warning:

arch/arm64/kernel/entry-common.c:97:2-3: Unneeded semicolon
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20200418081909.41471-1-yanaijie@huawei.comSigned-off-by: Will Deacon <will@kernel.org>