CHROMIUM: phy: mediatek: pcie: Add PCIe phy support for MT8196

Add PCIe phy support for MT8196.

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

Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
Change-Id: Ib4ebad8a8b188299142ebcc2730e2aa28204ccf0
Signed-off-by: Fei Shao <fshao@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/6073732


Reviewed-by: Hsin-Te Yuan <yuanhsinte@chromium.org>
Signed-off-by: Hubert Mazur <hmazur@google.com>