staging: hikey9xx: hi6421-spmi-pmic: cleanup header file

Remove the IRQ list from the header, as this is used only
inside the driver itself. Also, get rid of two unused
defines.

The net result is that only struct hi6421_spmi_pmic remains
on it, as this is used by the regulator driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/138c3a11e4de0ebabdf27932957852136c2f7510.1611949675.git.mchehab+huawei@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>