clk: tegra: EMC clock driver depends on EMC driver

The EMC clock driver uses symbols exported by the EMC driver, so it
needs the corresponding dependency to avoid build breakage.

Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/clk/Kconfig

@@ -158,3 +158,4 @@ source "drivers/clk/bcm/Kconfig"
 source "drivers/clk/mvebu/Kconfig"
 
 source "drivers/clk/samsung/Kconfig"
+source "drivers/clk/tegra/Kconfig"