[PATCH] mtd: cfi_cmdset_0002: fix the check for valid primary extension versions

[Gernot Hoyler]

 > Valid primary extension versions are: 1.0, 1.1, 1.2, 1.3 [1][2].
 > Fix the check in cfi_cmdset_0002 accordingly.
 > ...

I would prefer not to remove CFI 1.4 support from the AMD/Spansion 
driver. For example, the Spansion S29WS-P device family uses CFI version 
1.4, see page 90 of the datasheet 
http://www.spansion.com/Support/Datasheets/s29ws-p_00_a12_e.pdf.

--Gernot