clk: msm: Add reset support in virtual clock frontend driver

To support reset function in virtual clock driver, we register
a reset controller in virtual clock front driver. It is a virtual
reset controller which talks with host backend via virtual clock
message.

Change-Id: I13d48180534110260d66e42f3a02b63c2afcaeca
Signed-off-by: Zhiqiang Tu <ztu@codeaurora.org>