usb: device: Refactor vendor_handler
usb: device: Refactor vendor_handler

Since vendor commands cannot assume that wIndex keeps interface number
we change logic trying to call every vendor handler which should check
input parameters.

Signed-off-by: Andrei Emeltchenko <a6565233ddc88e4fb9c66c1d70743223493f2ed4@intel.com>

punitvara/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,nashif/zephyr,explora26/zephyr,punitvara/zephyr,Vudentz/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,ldts/zephyr,Vudentz/zephyr,ldts/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,explora26/zephyr,finikorg/zephyr,kraj/zephyr,nashif/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,kraj/zephyr,kraj/zephyr,nashif/zephyr,kraj/zephyr,finikorg/zephyr,ldts/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,galak/zephyr,explora26/zephyr,galak/zephyr,ldts/zephyr,punitvara/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,punitvara/zephyr,finikorg/zephyr,galak/zephyr,kraj/zephyr,ldts/zephyr