[MIPS] IP22, IP28: Fix merge bug

Instead of one SGI_HAS_HAL2 for IP22 and one for IP28, IP28 got two of
them... Let's give IP22 some ALSA sound, too.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>[MIPS] IP22, IP28: Fix merge bug

Instead of one SGI_HAS_HAL2 for IP22 and one for IP28, IP28 got two of
them... Let's give IP22 some ALSA sound, too.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>