crossystem: Revise description of sw_wpsw_boot.

The sw_wpsw_boot was made for some feature that was almost never completed, and
only makes sense on Baytrail platforms. To prevent confusion we should address
that in the crossystem description.

BRANCH=none
BUG=chromium:508269
TEST=make test

Change-Id: I1fbc7a0e9e8c1f8503ae8ae9dfb6e80c8da892e3
Reviewed-on: https://chromium-review.googlesource.com/284425
Tested-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
diff --git a/utility/crossystem.c b/utility/crossystem.c
index a6c2d74..606240e 100644
--- a/utility/crossystem.c
+++ b/utility/crossystem.c
@@ -83,7 +83,7 @@
   {"savedmem_base", 0, "RAM debug data area physical address", "0x%08x"},
   {"savedmem_size", 0, "RAM debug data area size in bytes"},
   {"sw_wpsw_boot", 0,
-   "Firmware write protect software setting enabled at boot"},
+   "Firmware write protect software setting enabled at boot (Baytrail only)"},
   {"tpm_attack", CAN_WRITE, "TPM was interrupted since this flag was cleared"},
   {"tpm_fwver", 0, "Firmware version stored in TPM", "0x%08x"},
   {"tpm_kernver", 0, "Kernel version stored in TPM", "0x%08x"},