ichspi: Set FDBC before reading JEDEC ID

It seems like data count needs to be set before JEDEC ID is read using
Flash cycle op 0x6.

BUG=b:37087910
BRANCH=None
TEST=Verified that "flashrom -p host -r /tmp/test.bin" is able to
identify flash chip correctly and read works fine. Also verified that
flashrom write from host works fine on poppy.

Change-Id: Ice195533bb68f642621460a08ac508adc3aa9433
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/471047
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed