dpaa_eth: Remove useless declaration

Clang warns:

drivers/net/ethernet/freescale/dpaa/dpaa_eth.c:2734:34: warning:
tentative array definition assumed to have one element
static const struct of_device_id dpaa_match[];
                                 ^
1 warning generated.

Turns out that since this driver was introduced in commit 9ad1a374
("dpaa_eth: add support for DPAA Ethernet"), this declaration has been
unused. Remove it to silence the warning.
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa/dpaa_eth.c

@@ -2731,8 +2731,6 @@ static int dpaa_ingress_cgr_init(struct dpaa_priv *priv)
 	return err;
 }
 
-static const struct of_device_id dpaa_match[];
-
 static inline u16 dpaa_get_headroom(struct dpaa_buffer_layout *bl)
 {
 	u16 headroom;