V4L/DVB (4670): Allow RC5 codes 64 - 127 in ir-kbd-i2c.c

The RC5 coding has for a long time supported commands 64-127 in addition
to 0-63.  This is controlled by the second bit of the RC5 packet (see
The attached patch modifies ir-kbd-i2c.c to allow for commands 64-127,
tested with a PVR350 card in combination with a programmable remote.

Signed-off-by: David Hardeman <david@hardeman.nu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>