mm/hugetlb: enforce brace style

mm/hugetlb: enforce brace style

Documentation/process/coding-style.rst explicitly notes that if only one
branch of a conditional statement is a single statement, braces should be
used in both branches.  Enforce this in mm/hugetlb.c.

While add it, fix the indentation for vma_end_reservation.

No functional change intended.

Link: https://lkml.kernel.org/r/20260116192717.1600049-2-joshua.hahnjy@gmail.com
Signed-off-by: Joshua Hahn <joshua.hahnjy@gmail.com>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>