pci: kconfig: Setup proper dependency for PCIE_ROCKCHIP

There is missing dependency for PCIE_ROCKCHIP which selects
PHY_ROCKCHIP_PCIE which directly depends on ARCH_ROCKCHIP.

WARNING: unmet direct dependencies detected for PHY_ROCKCHIP_PCIE
  Depends on [n]: ARCH_ROCKCHIP [=n]
  Selected by [y]:
  - PCIE_ROCKCHIP [=y] && PCI [=y]

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 06d39df..c19d09b 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -260,6 +260,7 @@
 
 config PCIE_ROCKCHIP
 	bool "Enable Rockchip PCIe driver"
+	depends on ARCH_ROCKCHIP
 	select DM_PCI
 	select PHY_ROCKCHIP_PCIE
 	default y if ROCKCHIP_RK3399