PCI: dwc: Move CONFIG_PCI depends to menu

There's no need for every config option to explicitly depend on
CONFIG_PCI, so move it out of individual option to the menu option.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Jingoo Han <jingoohan1@gmail.com>