regulator: drivers: Remove unnecessary print function dev_err()

The print function dev_err() is redundant because
platform_get_irq_byname() already prints an error.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=1986


Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220825070438.128093-1-yang.lee@linux.alibaba.com


Signed-off-by: Mark Brown <broonie@kernel.org>