[media] fix saa7111 non-detection

One saa7111 device is reporting a different ID:

saa7115 0-0024: chip found @ 0x48 (ID 0f7111d0e111111) does not match a known saa711x chip.

As this is for sure a saa7111, change the detection code to also
cover this device.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>