usb device on bf609 ezkit sometimes has error in inquiry, especially under Core: 500 MHz, System0: 125 MHz, System1: 125 MHz.
U-Boot 2013.07 (ADI-2013R1)-dirty (Sep 27 2013 - 09:46:02), Build: jenkins-label=UBOOT_BF609-EZKIT-351^M
^M
CPU: ADSP bf609-0.0 (Detected Rev: 0.0) (parallel flash boot)^M
Board: ADI BF609 EZ-Kit board^M
Support: http://blackfin.uclinux.org/^M
Clock: VCO: 500 MHz, Core: 500 MHz, System0: 125 MHz, System1: 125 MHz, Dclk: 250 MHz^M
RAM: 128 MiB^M
Flash: 16 MiB^M
MMC: Blackfin SDH: 0^M
In: serial^M
Out: serial^M
Err: serial^M
other init^M
Net: mii0^M
Hit any key to stop autoboot: 9 watchdog restart successfully
waiting for uboot prompt
^H^H^H 0 ^M
bfin> got u-boot prompt
icache on^M
bfin> dcache on^M
bfin> reginfo^M
^M*****
STEP 41: Test USB Storage
usb start^M
(Re)start USB...^M
USB0: scanning bus 0 for devices... 1 USB Device(s) found^M
scanning usb for storage devices... error in inquiry^M
0 Storage Device(s) found^M
bfin> fatls usb 0^M
** Bad device usb 0 **^M
bfin> ERROR: can not find uimage
Attempting to recover to u-boot prompt
got u-boot prompt
<interrupt>^M
bfin> versioRecovered</interrupt>
===== Recording result: usb is fail
