Bluetooth: hci_usb: Read the whole USB EPOUT buffer at once
Bluetooth: hci_usb: Read the whole USB EPOUT buffer at once

btusb_bulk_out() reads the EPOUT buffer in multiple of 4 bytes because
of Quark's USB FIFO size limitation. But this has later been taken care
internally in the DW driver making it redundant in hci_usb.

Remove Quark specific handling and read the whole EPOUT buffer at once.

Signed-off-by: Sundar Subramaniyan <a60920e96b5d59ab058578b6d9240f5162f94f1e@gmail.com>

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