drivers: usb_dc_nrfx: Align with nrfx version 1.4.0
drivers: usb_dc_nrfx: Align with nrfx version 1.4.0

A typo in the name of the bmRequest field in the nrfx_usbd_setup_t
structure was fixed in nrfx version 1.4.0. Update the driver to use
the new correct name: bRequest.

Signed-off-by: Andrzej Głąbek <6788b8d556a8a447102338fc996c42180ecff44e@nordicsemi.no>

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