arm relocation: Fix calculation of board_init_r

Signed-off-by: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>

arch/arm/cpu/arm926ejs/start.S

@@ -281,7 +281,7 @@ _nand_boot_ofs:
 	.word nand_boot
 #else
 	ldr	r0, _board_init_r_ofs
-	adr	r1, _start
+	ldr	r1, _TEXT_BASE
 	add	lr, r0, r1
 	add	lr, lr, r9
 	/* setup parameters for board_init_r */