Change in coreboot[master]: soc/intel/common/fast_spi: support caching `ext_bios` in ramstage

[Subrata Banik (Code Review)]

Attention is currently required from: Subrata Banik, Tim Wawrzynczak, Angel Pons, Nick Vaccaro, Eric Lai.
Hello build bot (Jenkins), Tim Wawrzynczak, Angel Pons, Arthur Heymans, Nick Vaccaro, Eric Lai, Werner Zeh,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/62837

to look at the new patch set (#2).

Change subject: soc/intel/common/fast_spi: support caching `ext_bios` in ramstage
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soc/intel/common/fast_spi: support caching `ext_bios` in ramstage

This patch provides a way to cache ext_bios region for all stages.

TEST=Able to see ext_bios region in MTRR snapshot when cached.

Signed-off-by: Subrata Banik 
Change-Id: I87139a9ed7eb9ed43164a5199aa436dd1219145c
---
M src/soc/intel/common/block/fast_spi/fast_spi.c
1 file changed, 8 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/37/62837/2