staging/serqt_usb2: refactor qt_unthrottle() in serqt_usb2.c
staging/serqt_usb2: refactor qt_unthrottle() in serqt_usb2.c

Modified to eliminate the deep nesting.

Signed-off-by: YAMANE Toshiaki <314e010f9a6bb116c4db2299964ddca238f57440@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs