KVM: arm64: Don't use kerneldoc comment for arm64_check_features()

KVM: arm64: Don't use kerneldoc comment for arm64_check_features()

A double-asterisk opening mark to the comment (i.e. '/**') indicates a
comment block is in the kerneldoc format. There's automation in place to
validate that kerneldoc blocks actually adhere to the formatting rules.

The function comment for arm64_check_features() isn't kerneldoc; use a
'regular' comment to silence automation warnings.

Link: https://lore.kernel.org/all/202309112251.e25LqfcK-lkp@intel.com/
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20230913165645.2319017-1-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>