Fixes the following build warning:

  >> drivers/mfd/mt6360-core.c:148:2: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
  REGMAP_IRQ_REG_LINE(MT6360_CHG_TREG_EVT, 8),
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  include/linux/regmap.h:1191:10: note: expanded from macro 'REGMAP_IRQ_REG_LINE'
  [_id] = {                                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  drivers/mfd/mt6360-core.c:124:2: note: previous initialization is here
  REGMAP_IRQ_REG_LINE(MT6360_CHG_TREG_EVT, 8),
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  include/linux/regmap.h:1191:10: note: expanded from macro 'REGMAP_IRQ_REG_LINE'
  [_id] = {                                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  1 warning generated.
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>