socrates: adjust TEXT_BASE to increase U-Boot image size

We need more room for the U-Boot image.
Shift TEXT_BASE as needed.

Signed-off-by: Wolfgang Denk <wd@denx.de>

board/socrates/config.mk

@@ -26,4 +26,4 @@
 # socrates board
 # default CCARBAR is at 0xff700000
 #
-TEXT_BASE = 0xfffa0000
+TEXT_BASE = 0xfff80000