staging: gdm724x: fix checkpatch.pl camelCase warning

Fixes the checkpatch.pl warning: Avoid CamelCase
Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gdm724x/gdm_lte.h

@@ -49,7 +49,7 @@ struct phy_dev {
 	int	(*send_hci_func)(void *priv_dev, void *data, int len,
 				 void (*cb)(void *cb_data), void *cb_data);
 	int	(*send_sdu_func)(void *priv_dev, void *data, int len,
-				 unsigned int dftEpsId, unsigned int epsId,
+				 unsigned int dft_eps_id, unsigned int eps_id,
 				 void (*cb)(void *cb_data), void *cb_data,
 				 int dev_idx, int nic_type);
 	int	(*rcv_func)(void *priv_dev,