board/lsi: Fix Checkpatch Warnings

Signed-off-by: John Jacques <john.jacques@lsi.com>
board/lsi: Added Warning Message when Voltage Is Out Of Range

Voltage out of range causes a boot failure, but only indicated the line
number.  Now there is a message as well.

Signed-off-by: John Jacques <john.jacques@lsi.com>
board/lsi: Fix Compiler Warnings

Signed-off-by: John Jacques <john.jacques@lsi.com>