regulator: tps650xx - build fixes for x86_64

Fixes the following errors on both tps650xx regulator drivers :-

drivers/regulator/tps65023-regulator: struct i2c_device_id is 32 bytes.  The last of 1 is:
0x74 0x70 0x73 0x36 0x35 0x30 0x32 0x33 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
FATAL: drivers/regulator/tps65023-regulator: struct i2c_device_id is not terminated with a NULL entry!

This patch also fixes the GPL v2 licence string for both drivers.

Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>