USB: Debugfs: Fix compilation issues when debugfs is disabled

When we disable debugfs some of the function driver does not
handle those error properly so we see error of kind variable
undeclared, too many arguements to function. This fixes all
these obseved issue

CRs-fixed: 551713
Change-Id: I1b60c86b1c489f77edf86a5df44f8766a08dc117
Signed-off-by: Tarun Gupta <tarung@codeaurora.org>
diff --git a/drivers/usb/gadget/u_rmnet.h b/drivers/usb/gadget/u_rmnet.h
index 06471a4..6a80529 100644
--- a/drivers/usb/gadget/u_rmnet.h
+++ b/drivers/usb/gadget/u_rmnet.h
@@ -54,6 +54,7 @@
 };
 
 int gbam_setup(unsigned int no_bam_port, unsigned int no_bam2bam_port);
+void gbam_cleanup(void);
 int gbam_connect(struct grmnet *gr, u8 port_num,
 	enum transport_type trans, u8 src_connection_idx,
 	u8 dst_connection_idx);