Blackfin: move section length calculation to linker script

The length of the sections is fixed at link time, so let the linker do the
calculation rather than doing it ourselves at runtime.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/cpu/blackfin/start.S b/cpu/blackfin/start.S
index 7cbd632..44e2725 100644
--- a/cpu/blackfin/start.S
+++ b/cpu/blackfin/start.S
@@ -139,11 +139,10 @@
 .Ldma_and_reprogram:
 	r0.l = LO(L1_INST_SRAM);
 	r0.h = HI(L1_INST_SRAM);
-	r1.l = __initcode_start;
-	r1.h = __initcode_start;
-	r2.l = __initcode_end;
-	r2.h = __initcode_end;
-	r2 = r2 - r1;	/* convert r2 into length of initcode */
+	r1.l = __initcode_lma;
+	r1.h = __initcode_lma;
+	r2.l = __initcode_len;
+	r2.h = __initcode_len;
 	r1 = r1 - r4;	/* convert r1 from load address of initcode ... */
 	r1 = r1 + r5;	/* ... to current (not load) address of initcode */
 	p3 = r0;
@@ -173,12 +172,11 @@
 	 * takes care of clearing things for us.
 	 */
 	serial_early_puts("Zero BSS");
-	r0.l = __bss_start;
-	r0.h = __bss_start;
+	r0.l = __bss_vma;
+	r0.h = __bss_vma;
 	r1 = 0 (x);
-	r2.l = __bss_end;
-	r2.h = __bss_end;
-	r2 = r2 - r0;
+	r2.l = __bss_len;
+	r2.h = __bss_len;
 	call _memset;
 
 .Lnorelocate: