power: supply: qcom_smbx: allow disabling charging

power: supply: qcom_smbx: allow disabling charging

Hook up USBIN_CMD_IL so that writing "0" to the status register will
disable charging, this is useful to let users limit charging
automatically.

Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20260315-smb2-cherry-pick-v1-1-b2710e470490@ixit.cz
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>