it85spi.c: Reorder functions with primitives at the top

Reshuffle file with no semantic changes, this avoids unnecessary
prototypes for static member functions as to pave the way for further
cleanups as well as an easier to parse implementation.

BUG=b:172876667
TEST=builds

Change-Id: Idf4241c92d90c28dd4f4ec3b7d66bda50801385a
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/47657
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed