riscv: dts: spacemit: drop incorrect pinctrl for combo PHY

riscv: dts: spacemit: drop incorrect pinctrl for combo PHY

The combo PHY on the Banana Pi F3 is used for the USB 3.0 port. The high
speed differential lanes are always configured as such, and do not
require a pinctrl entry.

The existing pinctrl entry only configures PCIe secondary pins, which
are unused for USB and instead routed to the MIPI CSI1 connector.

Remove this incorrect pinctrl entry.

Fixes: 0be016a4b5d1b9 ("riscv: dts: spacemit: PCIe and PHY-related updates")
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Yixun Lan <dlan@kernel.org>
Link: https://lore.kernel.org/r/20260322202502.2205755-1-aurelien@aurel32.net
Signed-off-by: Yixun Lan <dlan@kernel.org>