Revert "msm8660: scorpion CPU_VARIANT is broken; use cortex-a8 for now"

  * scorpion CPU_VARIANT fixed in http://review.cyanogenmod.org/#/c/56062

This reverts commit 360019f675b5895e2a1930d0318981a33c1ae8bd.

Change-Id: I3a8814ae92cab88b750c011cd60b75c061733725
msm8660: on radio version check, support more than 1 version format per model

  * up until now, all radios for a particular model followed a certain format:
    e.g. I727: UCMC1 or I727R: UXUMA7  (4 or 5 letters followed by a number)
  * exhilarate now has two radios that work but have different version formats:
    UCAMK1 and UCLH3   (4 AND 5 letters followed by a number)
  * add the ability to take in more than 1 minversion for each model
  * only compare versions that match in format
  * error (disallow flash) if installed radio's version format is not
    understood

Change-Id: Ib49df7440c4dfc17469fd8a9c4263b152c7f8654