iio: dac: ad3552r-hs: clear reset status flag

Clear reset status flag, to keep error status register
clean after reset (ad3552r manual, rev B table 38).

Reset error flag was left to 1, so debugging registers, the
"Error Status Register" was dirty (0x01). It is important
to clear this bit, so if there is any reset event over normal
working mode, it is possible to detect it.

Fixes: 0b4d9fe5 ("iio: dac: ad3552r: add high-speed platform driver")
Signed-off-by: Angelo Dureghello <adureghello@baylibre.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250108-wip-bl-ad3552r-axi-v0-iio-testing-carlos-v2-2-2dac02f04638@baylibre.com


Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>