drm/radeon: fix UBSAN warning in kv_dpm.c

stable inclusion
from stable-v4.19.317
commit 07e8f15fa16695cf4c90e89854e59af4a760055b
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/IACR1V
CVE: CVE-2024-40988

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=07e8f15fa16695cf4c90e89854e59af4a760055b



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commit a498df5421fd737d11bfd152428ba6b1c8538321 upstream.

Adds bounds check for sumo_vid_mapping_entry.

Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kaixiong Yu <yukaixiong@huawei.com>