eNET: Create distinct board configurations

Position independant functionality is due for removal from the x86
architecture, so create two distinct configurations - One for Flash and
one for SRAM
diff --git a/boards.cfg b/boards.cfg
index 9b34287..8bec9b7 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -199,7 +199,8 @@
 ip04                         blackfin    blackfin
 tcm-bf518                    blackfin    blackfin
 tcm-bf537                    blackfin    blackfin
-eNET                         i386        i386        -                   -              sc520
+eNET                         i386        i386        eNET                -              sc520       eNET:SYS_TEXT_BASE=0x38040000
+eNET_SRAM                    i386        i386        eNET                -              sc520       eNET:SYS_TEXT_BASE=0x19000000
 idmr                         m68k        mcf52x2
 TASREG                       m68k        mcf52x2     tasreg              esd
 M5208EVBE                    m68k        mcf52x2     m5208evbe           freescale