[coreboot] Endian issue for libpayload options

[Sean McNeil]

options are broken for x86 because it is assuming big endian. A quick 
patch to make it work:

diff --git a/payloads/libpayload/drivers/options.c 
b/payloads/libpayload/drivers
index 70c2b17..a7a5d82 100644
--- a/payloads/libpayload/drivers/options.c
+++ b/payloads/libpayload/drivers/options.c
@@ -69,7 +69,7 @@ int options_checksum_valid(const struct nvram_accessor 
*nvram)
                 checksum += nvram->read(i);
         }

-       checksum_old = ((nvram->read(checksum_location)<<8) | 
nvram->read(checks
+       checksum_old = ((nvram->read(checksum_location+1)<<8) | 
nvram->read(chec

return (checksum_old == checksum);
  }

Maybe a union and assigning each byte is the correct approach?

Cheers,
Sean