kexec_file: remove unused arch_kexec_locate_mem_hole hook

No architecture provides an implementation of
arch_kexec_locate_mem_hole(). Use kexec_locate_mem_hole() directly
and remove the unused fallback wrapper from the kexec header.

This simplifies the kexec memory allocation path without changing
its behavior. No functional changes intended.

The arch hook was introduced by commit f891f19736bd ("kexec_file: Allow
archs to handle special regions while locating memory hole"), and its
last user was removed by commit 6e5250eaa665 ("powerpc/crash: use
generic APIs to locate memory hole for kdump").

Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Paul Walmsley <pjw@kernel.org>
Cc: Pratyush Yadav <pratyush@kernel.org>
Cc: linux-riscv@lists.infradead.org
Cc: kexec@lists.infradead.org
Acked-by: Baoquan He <baoquan.he@linux.dev>
Reviewed-by: Mukesh Pilaniya <mpilaniy@redhat.com>
Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Link: https://patch.msgid.link/20260905145835.501635-1-sourabhjain@linux.ibm.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

0 files changed, 0 insertions, 0 deletions