target/sh4: Remove TARGET_ALIGNED_ONLY

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

configs/targets/sh4-linux-user.mak

 TARGET_ARCH=sh4
 TARGET_SYSTBL_ABI=common
 TARGET_SYSTBL=syscall.tbl
-TARGET_ALIGNED_ONLY=y
 TARGET_HAS_BFLT=y

configs/targets/sh4-softmmu.mak

 TARGET_ARCH=sh4
-TARGET_ALIGNED_ONLY=y

configs/targets/sh4eb-linux-user.mak

 TARGET_ARCH=sh4
 TARGET_SYSTBL_ABI=common
 TARGET_SYSTBL=syscall.tbl
-TARGET_ALIGNED_ONLY=y
 TARGET_BIG_ENDIAN=y
 TARGET_HAS_BFLT=y

configs/targets/sh4eb-softmmu.mak

 TARGET_ARCH=sh4
-TARGET_ALIGNED_ONLY=y
 TARGET_BIG_ENDIAN=y