mfd: mt6397: Align the placement at which the mfd_cell of LED is defined

Align the placement as which the mfd_cell of LED is defined as the other
members done on the structure.

Signed-off-by: Sean Wang <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/mfd/mt6397-core.c

···
 	{
 		.name = "mt6323-regulator",
 		.of_compatible = "mediatek,mt6323-regulator"
-	},
-	{
+	}, {
 		.name = "mt6323-led",
 		.of_compatible = "mediatek,mt6323-led"
 	},