power/supply: Modify USB usage options greyed out.

&&&%%%comment::Modify USB usage options greyed out.
&&&%%%bug number:FP4-3123
&&&%%%root cause:coding
&&&%%%Bug category:T2M
&&&%%%Module_Impact:kernel
&&&%%%Test_Suggestion:NA
&&&%%%Solution:usb
&&&%%%Test_Report:ok
&&&%%%VAL Can Test:NA