bus: qcom-ssc-block-bus: Remove some duplicated iounmap() calls

bus: qcom-ssc-block-bus: Remove some duplicated iounmap() calls

reg_mpm_sscaon_config[01] are allocated with devm_ioremap_resource(). So,
they will be unmapped automatically by the manage resource framework.

Remove the incorrect explicit iounmap() calls from the remove function.

Fixes: 97d485edc1d9 ("bus: add driver for initializing the SSC bus on (some) qcom SoCs")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/efd06711b126e761a06eb5ef82daf9ad4e116a10.1740932040.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Bjorn Andersson <andersson@kernel.org>