soc: xilinx: Create folder structure for soc specific drivers

Create directory structure with Makefile/Kconfig for adding xilinx soc
specific drivers.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

drivers/soc/Kconfig

@@ -16,6 +16,7 @@ source "drivers/soc/tegra/Kconfig"
 source "drivers/soc/ti/Kconfig"
 source "drivers/soc/ux500/Kconfig"
 source "drivers/soc/versatile/Kconfig"
+source "drivers/soc/xilinx/Kconfig"
 source "drivers/soc/zte/Kconfig"
 
 endmenu

drivers/soc/Makefile

@@ -22,4 +22,5 @@ obj-$(CONFIG_ARCH_TEGRA)	+= tegra/
 obj-$(CONFIG_SOC_TI)		+= ti/
 obj-$(CONFIG_ARCH_U8500)	+= ux500/
 obj-$(CONFIG_PLAT_VERSATILE)	+= versatile/
+obj-y				+= xilinx/
 obj-$(CONFIG_ARCH_ZX)		+= zte/

drivers/soc/xilinx/Kconfig

+# SPDX-License-Identifier: GPL-2.0
+menu "Xilinx SoC drivers"
+
+endmenu

drivers/soc/xilinx/Makefile

+# SPDX-License-Identifier: GPL-2.0