Blackfin: stick ins/outs funcs into their own .text section

This lets the linker garbage collect these functions when they aren't
actually used by placing them into the standard .text.<func> section.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/lib/ins.S b/arch/blackfin/lib/ins.S
index 4519596..3ac6d84 100644
--- a/arch/blackfin/lib/ins.S
+++ b/arch/blackfin/lib/ins.S
@@ -71,6 +71,7 @@
  */
 
 #define COMMON_INS(func, ops) \
+.section .text._ins##func; \
 ENTRY(_ins##func) \
 	P0 = R0;	/* P0 = port */ \
 	CLI_OUTER;	/* 3 instructions before first read access */ \