USB: Enter class directory when the CCID driver is enabled

The drivers/usb/Makefile is not including the class directory
when only the CCID class driver is enabled.

Change-Id: I5360070c4537235903691d59cb548ee027a7ffb8
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
1 file changed