Fix qc_quick test.
Fix qc_quick test.

Remove assumption SPIFFS_OBJ_LOOKUP_PAGES(FS) is always an even number.
This assumption can be invalid when there is a smaller number of pages
per block.

igrr/spiffs,ongjohn/spiffs,pellepl/spiffs,EmuxEvans/spiffs,benpicco/spiffs,mikewang01/spiffs,PawelDefee/spiffs,pellepl/spiffs