mfd: qcom-pm8008: Convert irq chip to config regs

Replace type and virtual registers, which are both deprecated,
with config registers. This also simplifies the driver because
IRQ types are set in one place, the set_type_config() callback.

Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
[Lee: Squashed in fix-up patch from Stephen Rothwell adapting to new .set_type_config() API]
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230216222214.138671-3-aidanmacdonald.0x0@gmail.com