ARC: [plat-hsdk] Add PCIe support

Add PCI support to the ARC HSDK platform allowing to use the generic PCI
setup functions.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/plat-hsdk/Kconfig

@@ -9,3 +9,4 @@ menuconfig ARC_SOC_HSDK
 	bool "ARC HS Development Kit SOC"
 	select CLK_HSDK
 	select RESET_HSDK
+	select MIGHT_HAVE_PCI