ichspi: Extract initialisation of swseq and hwseq into a function

Initialisation of swseq_data and hwseq_data gets its own function,
which is called from init_ich_default. This makes init_ich_default
more readable.

This patch also gives a name to (previously anonymous) struct
swseq_data. Its sibling struct hwseq_data already has a name. Structs
need names to be able to declare function parameters.

TEST ME ON ICH7

BUG=b:204488958
TEST=Check that the following scenarios still behave properly:
1) probe-read-verify-erase section-write-reboot
on Intel octopus board with GD25LQ128C/GD25LQ128D/GD25LQ128E
2) probe and read on Panther Point (7 series PCH)

Change-Id: I7d62b1b380e497b82dcae1284d752204cc541bd3
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Tested-by: Anastasia Klimchuk <aklm@chromium.org>
Tested-by: Nico Huber <nico.h@gmx.de>
---
M ichspi.c
1 file changed, 57 insertions(+), 50 deletions(-)