tree/: Convert flashchip probe func ptr to enumerate

This forges the way for flashchips.c to be pure declarative
data and lookup functions for dispatch to be pure. This
means that the flashchips data could be extracted out to
be agnostic data of the flashrom code and algorithms.

squash in,

flashchip.c: probe_jedec_29gl
flashchip.c: probe_82802ab
flashchip.c: probe_opaque
flashchip.c: probe_jedec
flashchip.c: probe_spi_res2
flashchip.c: probe_spi_res1
flashchip.c: probe_spi_rems
flashchip.c: probe_spi_at25f
flashchip.c: probe_spi_at45db
flashchip.c: probe_spi_st95
flashchip.c: probe_spi_sfdp
flashchip.c: probe_spi_rdid{4}
flashchip.c: probe_w29ee011
flashchip.c: probe_en29lv640b
flashchip.c: edi_probe_kb9012
flashchip.c: probe_spi_big_spansion

Change-Id: I00aaab9c83f305cd47e78c36d9c2867f2b73c396
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
---
M flashchips.c
M flashrom.c
M include/flash.h
M tests/spi25.c
4 files changed, 684 insertions(+), 596 deletions(-)