asm-generic: Remove ide_iops.h

The last user of ide_iops.h was removed in commit b7fb14d3


("ide: remove the legacy ide driver") in v5.14.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>