sh: Rename opcode_t to insn_size_t.

This is now clashing with a driver, so just rename it.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/io_trapped.c b/arch/sh/kernel/io_trapped.c
index c22853b..77dfecb 100644
--- a/arch/sh/kernel/io_trapped.c
+++ b/arch/sh/kernel/io_trapped.c
@@ -267,7 +267,7 @@
 int handle_trapped_io(struct pt_regs *regs, unsigned long address)
 {
 	mm_segment_t oldfs;
-	opcode_t instruction;
+	insn_size_t instruction;
 	int tmp;
 
 	if (!lookup_tiop(address))