Rename TEXT_BASE into CONFIG_SYS_TEXT_BASE

The change is currently needed to be able to remove the board
configuration scripting from the top level Makefile and replace it by
a simple, table driven script.

Moving this configuration setting into the "CONFIG_*" name space is
also desirable because it is needed if we ever should move forward to
a Kconfig driven configuration system.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/edb93xx/config.mk b/board/edb93xx/config.mk
index b627869..fab59ef 100644
--- a/board/edb93xx/config.mk
+++ b/board/edb93xx/config.mk
@@ -1,33 +1,33 @@
 LDSCRIPT := $(SRCTREE)/arch/arm/cpu/arm920t/ep93xx/u-boot.lds
 
 ifdef CONFIG_EDB9301
-TEXT_BASE = 0x05700000
+CONFIG_SYS_TEXT_BASE = 0x05700000
 endif
 
 ifdef CONFIG_EDB9302
-TEXT_BASE = 0x05700000
+CONFIG_SYS_TEXT_BASE = 0x05700000
 endif
 
 ifdef CONFIG_EDB9302A
-TEXT_BASE = 0xc5700000
+CONFIG_SYS_TEXT_BASE = 0xc5700000
 endif
 
 ifdef CONFIG_EDB9307
-TEXT_BASE = 0x01f00000
+CONFIG_SYS_TEXT_BASE = 0x01f00000
 endif
 
 ifdef CONFIG_EDB9307A
-TEXT_BASE = 0xc1f00000
+CONFIG_SYS_TEXT_BASE = 0xc1f00000
 endif
 
 ifdef CONFIG_EDB9312
-TEXT_BASE = 0x01f00000
+CONFIG_SYS_TEXT_BASE = 0x01f00000
 endif
 
 ifdef CONFIG_EDB9315
-TEXT_BASE = 0x01f00000
+CONFIG_SYS_TEXT_BASE = 0x01f00000
 endif
 
 ifdef CONFIG_EDB9315A
-TEXT_BASE = 0xc1f00000
+CONFIG_SYS_TEXT_BASE = 0xc1f00000
 endif