sh: Add register alignment helpers for shared flushers.

This plugs in some register alignment helpers for the shared flushers,
allowing them to also be used on SH-5. The main rationale here is that
in the SH-5 case we have a variable ABI, where the pointer size may not
equal the register width. This register extension is taken care of by
the SH-5 code already today, and is otherwise unused on the SH-4 code.
This combines the two and allows us to kill off the SH-5 implementation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/system_64.h b/arch/sh/include/asm/system_64.h
index 943acf5..218b54d 100644
--- a/arch/sh/include/asm/system_64.h
+++ b/arch/sh/include/asm/system_64.h
@@ -37,4 +37,9 @@
 #define jump_to_uncached()	do { } while (0)
 #define back_to_cached()	do { } while (0)
 
+static inline reg_size_t register_align(void *val)
+{
+	return (unsigned long long)(signed long long)(signed long)val;
+}
+
 #endif /* __ASM_SH_SYSTEM_64_H */