CONFIG_S5P_DEV_USB_EHCI is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
CONFIG_S5P_DEV_USB_EHCI (not configurable)
configname: CONFIG_S5P_DEV_USB_EHCI
Linux Kernel Configuration
└─>S5P_DEV_USB_EHCI
In linux kernel since version 3 (release Date: 2011-07-21)
Compile in platform device definition for USB EHCI