configs: am335x_evm: enable CONFIG_CLK_TI_CTRL

This enables the clock controller driver support on TI's SoCs. This will
fix this GPIO issue at boot time:
request_and_set_gpio: Unable to request GPIO_PR1_MII_CTRL
request_and_set_gpio: Unable to request GPIO_MUX_MII_CTRL
request_and_set_gpio: Unable to request GPIO_FET_SWITCH_CTRL
request_and_set_gpio: Unable to request GPIO_PHY_RESET

This issue comes from the fact that the clock controller is not probed.

Enable the TI's clock controller driver support to solve this.

Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com>