mfd: max8925-core: Fix 'missing blank line after declarations' warning

This is part of an effort to clean-up the MFD subsystem.

WARNING: Missing a blank line after declarations
+       struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
+       max8925_irqs[data->irq - chip->irq_base].enable

WARNING: Missing a blank line after declarations
+       struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
+       max8925_irqs[data->irq - chip->irq_base].enable = 0;

total: 0 errors, 2 warnings, 927 lines checked

Signed-off-by: Lee Jones <lee.jones@linaro.org>