h8300: types: use <asm-generic/int-*.h> for the h8300 architecture

This modifies <asm-h8300/types.h> to use the <asm-generic/int-*.h>
generic include files.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>