V4L/DVB (6809): git-dvb: drivers/media/video/et61x251/et61x251_core.c: fix warnings

drivers/media/video/et61x251/et61x251_core.c:390: warning: 'et61x251_i2c_read' defined but not used
drivers/media/video/et61x251/et61x251_core.c:397: warning: 'et61x251_i2c_write' defined but not used

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>