msmsdcc_enable_clocks() was incorrectly being called depending on
the state of host->clks_on. This means the busclk idle timer was never
being deleted if the clock was already on.. Bogus.

    Also fixes a possible double clk disable if the call to
del_timer_sync() in msmsdcc_disable_clocks() raced with
the busclk timer.
Signed-off-by: NSan Mehat <san@google.com>
Signed-off-by: NDaniel Walker <dwalker@codeaurora.org>