msm_serial_hs: ensure clock_count follows clk_state

Unbalanced clock votes can cause inconsitencies
in the clk_count and clk_state. Ensure consistency during
shutdown so that the subsequent operations are not affected

CRs-Fixed: 713831
Change-Id: I7b20a56f37e84d7dbfd5d7221c29cfdb18ce3adb
Signed-off-by: Naveen Kaje <nkaje@codeaurora.org>