sh: add back asm/unaligned.h for sh4a

The sh4a compiler lacks knowledge of the movua.l instruction,
so now that the asm/unaligned.h code is fully generic across
all architectures, add back the previous hack for sh4a, improving
the performance of the checksum functions by [TBD]%.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
1 file changed