FROMLIST: dt-bindings: PCI: mediatek-gen3: Add MT8196 support

Add compatible string and clock definition for MT8196. It has 6 clocks like
the MT8195, but 2 of them are different.

Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
(am from https://patchwork.kernel.org/patch/13925168/)
(also found at https://lore.kernel.org/r/20250103060035.30688-2-jianjun.wang@mediatek.com

)

BUG=b:383258443
TEST=build pass and boot to shell
UPSTREAM-TASK=b:379039276

Change-Id: Ic34f0df57a7fd1ebaef1810d6cc58712b20e03b1
Signed-off-by: Hsin-Te Yuan <yuanhsinte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/6174697


Tested-by: Fei Shao <fshao@chromium.org>
Commit-Queue: Fei Shao <fshao@chromium.org>
Reviewed-by: Fei Shao <fshao@chromium.org>
Reviewed-by: Sean Paul <sean@poorly.run>
Signed-off-by: Hubert Mazur <hmazur@google.com>