board: samarium: Add dummy clock support for USB2
board: samarium: Add dummy clock support for USB2

Add dummy clock to fake clk_get/clk_put API's until full
support is available.

Change-Id: I6aba6a0b19d510863306fd11b447276994ab875a
Signed-off-by: Manu Gautam <51907cac86db5f2ed57a4ac58c042ecc27c0b352@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas