FROMLIST: mediatek MT7921: update bluetooth firmware to 20250625154126

Update binary firmware for MT7921 BT devices.

File: mediatek/BT_RAM_CODE_MT7961_1_2_hdr.bin
Version: 20250625154126

Change-Id: Id35f4ce4bf3ad5c5ff969a9625740b6a9742f9b6
Signed-off-by: Jiande Lu <jiande.lu@mediatek.corp-partner.google.com>
(am from https://lore.kernel.org/r/20250703052658.2930927-1-jiande.lu@mediatek.com/)

BUG=b:423808910
TEST=verify bt basic function on skyrim + MT7921

Change-Id: Ia17f7de479e9d9f32c4cbe4e89d0bc6b57557a0c
Signed-off-by: Tony Huang <tony-huang@quanta.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/linux-firmware/+/6703477
Tested-by: Hsin-chen Chuang <chharry@google.com>
Reviewed-by: Archie Pusaka <apusaka@chromium.org>
Reviewed-by: Hsin-chen Chuang <chharry@google.com>
Commit-Queue: Hsin-chen Chuang <chharry@google.com>
Reviewed-by: Larry Huang <mediatek.larry.huang@gmail.com>
Reviewed-by: Chris Lu <chris.lu@mediatek.corp-partner.google.com>
(cherry picked from commit 3addf077f72590d6ae124bfef045c454f8193777)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/linux-firmware/+/6704770
Reviewed-by: Jiande Lu <jiande.lu@mediatek.corp-partner.google.com>
Release-Owner: Alon Bajayo <alonbajayo@google.com>
Reviewed-by: Yun-hao Chung <howardchung@chromium.org>
Commit-Queue: Archie Pusaka <apusaka@chromium.org>