Preparations for upcoming lms8 recipe. Rename the lms recipe as lms7.
This will allow BSPs to choose either lms7 or lms8 package to suite
the version 7 or 8 firmware available on the board.

Also the lms binary & script is renamed to lms7 to avoid runtime clash
with lms8 packages.

Simplified the dounpack2 function.

And this build time warning is muted:

WARNING: lms7: No generic license file exists for: Modified in any
provider

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>

lms7 : tail conexist

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>