usb: gadget: u_serial: fix typo which cause build warning

fix typo error introduced by commit ea0e6276 (usb: gadget: add
multiple definition guards) which causes the following build warning:

  warning: "pr_vdebug" redefined

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c
index c5034d9c946b..b369292d4b90 100644
--- a/drivers/usb/gadget/u_serial.c
+++ b/drivers/usb/gadget/u_serial.c
@@ -136,7 +136,7 @@ static struct portmaster {
         pr_debug(fmt, ##arg)
 #endif /* pr_vdebug */
 #else
-#ifndef pr_vdebig
+#ifndef pr_vdebug
 #define pr_vdebug(fmt, arg...) \
         ({ if (0) pr_debug(fmt, ##arg); })
 #endif /* pr_vdebug */