net: fec: Remove bogus flush_dcache_range() call

Remove incorrectly called and duplicate flush_dcache_range() call
from fec_mxc driver. The call is not needed, since the caches are
already flushed in fec_tbd_init(), moreover the second argument should
be the ending address, not size.
Signed-off-by: NMarek Vasut <marex@denx.de>
Reported-by: NAlbert Aribaud <albert.u.boot@aribaud.net>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tom Rini <trini@ti.com>

drivers/net/fec_mxc.c

@@ -560,7 +560,6 @@ static int fec_init(struct eth_device *dev, bd_t* bd)
 		}
 		memset(fec->tbd_base, 0, size);
 		fec_tbd_init(fec);
-		flush_dcache_range((unsigned)fec->tbd_base, size);
 	}
 
 	/*