arm: remove unneeded symbol offsets and _TEXT_BASE

Remove the last uses of symbol offsets in ARM U-Boot.
Remove some needless uses of _TEXT_BASE.
Remove all _TEXT_BASE definitions.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
diff --git a/board/samsung/goni/lowlevel_init.S b/board/samsung/goni/lowlevel_init.S
index 726211a..d52bc09 100644
--- a/board/samsung/goni/lowlevel_init.S
+++ b/board/samsung/goni/lowlevel_init.S
@@ -22,9 +22,6 @@
  * r9 has Mobile DDR size, 1 means 1GiB, 2 means 2GiB and so on
  */
 
-_TEXT_BASE:
-	.word	CONFIG_SYS_TEXT_BASE
-
 	.globl lowlevel_init
 lowlevel_init:
 	mov	r11, lr
diff --git a/board/samsung/smdk2410/lowlevel_init.S b/board/samsung/smdk2410/lowlevel_init.S
index c7b78fd..5de04f1 100644
--- a/board/samsung/smdk2410/lowlevel_init.S
+++ b/board/samsung/smdk2410/lowlevel_init.S
@@ -110,16 +110,13 @@
 #define REFCNT			1113	/* period=15.6us, HCLK=60Mhz, (2048+1-15.6*60) */
 /**************************************/
 
-_TEXT_BASE:
-	.word	CONFIG_SYS_TEXT_BASE
-
 .globl lowlevel_init
 lowlevel_init:
 	/* memory control configuration */
 	/* make r0 relative the current location so that it */
 	/* reads SMRDATA out of FLASH rather than memory ! */
 	ldr     r0, =SMRDATA
-	ldr	r1, _TEXT_BASE
+	ldr	r1, =CONFIG_SYS_TEXT_BASE
 	sub	r0, r0, r1
 	ldr	r1, =BWSCON	/* Bus Width Status Controller */
 	add     r2, r0, #13*4
diff --git a/board/samsung/smdkc100/lowlevel_init.S b/board/samsung/smdkc100/lowlevel_init.S
index 4df0974..65e6b7a 100644
--- a/board/samsung/smdkc100/lowlevel_init.S
+++ b/board/samsung/smdkc100/lowlevel_init.S
@@ -17,9 +17,6 @@
  * r5 has zero always
  */
 
-_TEXT_BASE:
-	.word	CONFIG_SYS_TEXT_BASE
-
 	.globl lowlevel_init
 lowlevel_init:
 	mov	r9, lr