USB: musb: using 0 instead of NULL

Sparse complains (and rightly so):
drivers/usb/musb/cppi_dma.c:1458:33:
	warning: Using plain integer as NULL pointer

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c
index 6385eeb44a07..0db0f5e7d3a4 100644
--- a/drivers/usb/musb/cppi_dma.c
+++ b/drivers/usb/musb/cppi_dma.c
@@ -1455,7 +1455,7 @@ static int cppi_channel_abort(struct dma_channel *channel)
                  *    compare mode by writing 1 to the tx_complete register.
                  */
                 cppi_reset_tx(tx_ram, 1);
-                cppi_ch->head = 0;
+                cppi_ch->head = NULL;
                 musb_writel(&tx_ram->tx_complete, 0, 1);
                 cppi_dump_tx(5, cppi_ch, " (done teardown)");