Blackfin: move custom sections into sections.h

The Blackfin arch has a bunch of custom section markings for its on-chip
regions, but they aren't declared in the right header.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/include/asm/sections.h b/arch/blackfin/include/asm/sections.h
index 1443c33..e7fd0ec 100644
--- a/arch/blackfin/include/asm/sections.h
+++ b/arch/blackfin/include/asm/sections.h
@@ -4,4 +4,15 @@
 /* nothing to see, move along */
 #include <asm-generic/sections.h>
 
+/* only used when MTD_UCLINUX */
+extern unsigned long memory_mtd_start, memory_mtd_end, mtd_size;
+
+extern unsigned long _ramstart, _ramend, _rambase;
+extern unsigned long memory_start, memory_end, physical_mem_end;
+
+extern char _stext_l1[], _etext_l1[], _sdata_l1[], _edata_l1[], _sbss_l1[],
+	_ebss_l1[], _l1_lma_start[], _sdata_b_l1[], _sbss_b_l1[], _ebss_b_l1[],
+	_stext_l2[], _etext_l2[], _sdata_l2[], _edata_l2[], _sbss_l2[],
+	_ebss_l2[], _l2_lma_start[];
+
 #endif