USB: ehci-tegra: add clk_prepare/clk_unprepare
USB: ehci-tegra: add clk_prepare/clk_unprepare

Use clk_prepare/clk_unprepare as required by the generic clk framework.

Cc: 75ea6bb7bfc1186f92d26164de5f9268c9a45b59@rowland.harvard.edu
Cc: 4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org
Cc: 04647847fd97cbfacc3634f16263c8e3b46e8715@vger.kernel.org
Signed-off-by: Prashant Gaikwad <26d79ced2b65805d2e4185bb5e8f628ae4315577@nvidia.com>
Signed-off-by: Stephen Warren <5ef2a23ba3aff51d1cfc8c113c1ec34b608b3b13@nvidia.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs