sbc82xx: delete support for obsolete SBC8240/SBC8260

The EST SBC8260 is over 10 years old, and the SBC8240 older than
that.  With the tiny amount of RAM (by today's standards), there
really isn't anyone interested in running the latest U-boot on
these EOL products anymore.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
CC: jon.diekema@smiths-aerospace.com
diff --git a/include/configs/gw8260.h b/include/configs/gw8260.h
index 35e6944..93d6885 100644
--- a/include/configs/gw8260.h
+++ b/include/configs/gw8260.h
@@ -85,7 +85,7 @@
 #define CONFIG_SYS_SBC_BOOT_LOW 1
 
 /* What should the base address of the main FLASH be and how big is
- * it (in MBytes)? This must contain CONFIG_SYS_TEXT_BASE from board/sbc8260/config.mk
+ * it (in MBytes)? This must contain CONFIG_SYS_TEXT_BASE.
  * The main FLASH is whichever is connected to *CS0. U-Boot expects
  * this to be the SIMM.
  */