default or selected kernelversion does not have config value CONFIG_USB_EHCI_MXC.
Result is shown for kernelversion 6.9.9
Support for Freescale i.MX on-chip EHCI USB controller
modulename: ehci-mxc.ko
configname: CONFIG_USB_EHCI_MXC
Linux Kernel Configuration
└─>Device Drivers
└─>USB support
└─>Support for Freescale i.MX on-chip EHCI USB controller
In linux kernel since version 2.6.33 (release Date: 2010-02-24)
Variation of ARC USB block used in some Freescale chips.