wifi: rtw89: Lower the timeout in rtw89_fwdl_check_path_ready_ax() for USB

When the chip is not powered on correctly (like during driver
development) rtw89_fwdl_check_path_ready_ax() can fail.
read_poll_timeout_atomic() with a delay of 1 µs and a timeout of
400000 µs can take 50 seconds with USB because of the time it takes to
send a USB control message. The firmware upload is tried 5 times, so
in total it takes 250 seconds.

Lower the timeout to 3200 for USB in order to reduce the time
rtw89_fwdl_check_path_ready_ax() takes from 50 seconds to less than 1
second.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/af0b25d0-ea67-455e-91f2-8e4c18ae4328@gmail.com