Short answer, no.
Longer answer, you need to use AR/Gecko codes to modify the game to run at 60. This varies from game to game and you have to find these codes yourself in many cases, or make them.
30 frames is not a limitation with Dolphin, but a limitation with the game. Dolphin just emulates the speed at which the game was designed. There are only a few games that have variable framerates that don't affect game speed. Some games run at 60 by itself.
Longer answer, you need to use AR/Gecko codes to modify the game to run at 60. This varies from game to game and you have to find these codes yourself in many cases, or make them.
30 frames is not a limitation with Dolphin, but a limitation with the game. Dolphin just emulates the speed at which the game was designed. There are only a few games that have variable framerates that don't affect game speed. Some games run at 60 by itself.