UPSTREAM: 4BA: Add spi_exit_4ba function to switch SPI flash to 3-byte addressing

BUG=b:68158698
BRANCH=none
TEST=none

Change-Id: I3d8945653496e195534b7951c820c568acfbd57a
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Commit-Id: d94d254262594b912c65511b5d0675c6ab900d60
Original-Change-Id: I553e7fb5028f35e14a3a81b3fa8903c1b321a223
Original-Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Original-Reviewed-on: https://review.coreboot.org/20509
Original-Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-on: https://chromium-review.googlesource.com/735493
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
3 files changed