cr50: add mistral strap config
cr50: add mistral strap config

Mistral has a 1M PU on DIOA9 and a 5k PU on DIOA1. It needs to use
PLT_RST_L and SPI. Add this to the board config table.

BUG=b:124075760
BRANCH=cr50
TEST=Test on a mistral with the new straps. Make sure 0x41 is set in the
board properties.

Change-Id: Ie67610a39239fe2f86ead7e2643cb8bac16ef0d3
Signed-off-by: Mary Ruthven <81380f3403fed74252e92df3ed012a1819ec6296@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/1461081
Tested-by: Mary Ruthven <81380f3403fed74252e92df3ed012a1819ec6296@chromium.org>
Reviewed-by: Namyoon Woo <e8732cefb861f07768f47df788a8e8eb75efc09a@chromium.org>
Reviewed-by: Vadim Bendebury <5515d6d2d0829cbe0dd0dcf2094aaded06d58514@chromium.org>
Commit-Queue: Mary Ruthven <81380f3403fed74252e92df3ed012a1819ec6296@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec