amd_spi100: Use source-aligned read for the FIFO

Makes reading twice as fast (on this Raven Ridge).

Change-Id: I878c7603e514859c48a9c7823f98a391ea921b21
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72582
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed